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Makes 🢒 Pontiac 🢒 1984 🢒 Fiero 🢒 Bulletins 🢒 TRAILER TOWING BUMPER HITCH RECOMMENDATIONS

TRAILER TOWING BUMPER HITCH RECOMMENDATIONS

TRAILER TOWING INFORMATION - 1983 TO 1985

Trailer Towing

We receive many questions on trailer towing capacity for Pontiac vehicles. Attached are details for 1983, 1984 and 1985. This information is also contained in the Pontiac Merchandising Manual.

Bumper Mounted Hitches

The use of light weight bumper materials on some car lines means that bumper mounted hitches can no longer be used on those car lines.

Inability to use a bumper hitch does not mean a trailer cannot be towed. It does mean that at least a light weight frame/body hitch is required. In addition, the ability to use a bumper hitch does not mean that the car can tow a trailer. Consult the attached sheets for the car's towing ability.

In the following table, "yes" indicates that you can use a bumper mounted hitch. In no case should a bumper mounted hitch be used to tow more than 2,000 pounds, or more than 200 pounds torque weight.

WHAT YOUR TRAILER TOWING CUSTOMERS SHOULD KNOW WHEN ORDERING THEIR NEW 1983 PONTIACS

All 1983 Pontiacs are capable of towing up to 1,000 lbs. But since trailering enthusiasts often wish to pull heavier loads, Pontiac offers a list of available equipment to help them meet their varied trailering needs. Use the chart on the back side of this page to help your customers decide what equipment is best for them. They'll get just what they're after. And you'll get more satisfied customers. Plus, by using the information below on Trailering Considerations and Trailering Cautions, you can help answer many common questions your customers might have.

TRAILERING CONSIDERATIONS

New car break-in. Advise your customers to read the new car break-in instructions in their Owners Manual. Also, we recommend a new Pontiac be driven for 500 miles (800 kilometers) before trailer towing. During this initial break-in period, and for the first 500 miles (800 kilometers) of actual trailer towing, Pontiac owners should avoid full-throttle starts and speads over 50 mph (80 km/h). If a new engine, transmission, or axle is installed in the car, the same care should be observed.

Maintanance. Don't forget to tell your customers that more frequent service is required when using a car to pull a trailer. For example, all trailer hitch bolts and nuts should be checked occasionally for tightness. For other information regarding special maintenance requirements for trailers, direct your customers to their Owners Manual and Maintenance Schedule folder.

Engine cooling system. Advise your customers to follow these instructions: The coolant level should be checked when their car engine is cool, before starting on a trip. A temporary cooling system overload may be encountered on hot days when pulling on a long grade, when slowing down after higher speeds, or after long idle periods in heavy traffic. If overheating persists, their car should not be driven. And it should be checked by an authorized mechanic.

High altitude performance. An engine loses approximately 4% of its sea level performance for every 1,000 feet of altitude. An engine operating at 10,000 feet above level will lose approximately 40% of its performance. For pulling trailers at high altitudes, engines with higher sea level horsepower are recommended, as are higher axle ratios.

Tires. The tires furnished on 1983 Pontiacs are qualified for trailer towing. When towing trailer uaing a dead-weight hitch, tires should be inflated to the "Cold Tire Pressure" for "Maximum Load" shown on the tire placard attached on the left front door. For trailers using weight-distributing hitches, increase front tire pressure 2 psi above the "Cold Tire Pressure" for "Maximum Load" shown on the tire placard. This increase should never exceed maximum pressure shown on side of tire.

NOTE: The allowable passenger and cargo load for cars also shown on the same placard is reduced by the tongue weight whenever the trailer in attached to the car.

Before starting a trip. Tell customers to check lights, tires and mirror adjustment. And to check car and trailer brakes before turning into traffic.

Downgrades and long uphill grades. Speed should be reduced and lower transmission gear used to assist braking on long or steep down-grades. Transmission should be downshifted to a lower gear and speed reduced to 45 mph (70 km/h) or below on long uphill grades to reduce possibility of engine overheating. For normal towing with 4-speed automatic transmission, we recommand that you select 3rd gear instead of overdrive.

TRAILERING CAUTIONS

Brakes. To help avoid personal injury due to poor braking action, your customers should know that: 1. Trailer brakes of adequate size are required on trailers over 1,000 pounds loaded weight. 2. If trailer brakes are used with the car, follow the installation and balance instructions of the trailer brake maker. 3. They should not tap into the car's brake system if the trailer brake system uses more than 0.02 cubic inch of fluid from the car's master cylinder. In this case, the car's brake fluid capacity will not be enough to operate both the car and trailer brakes under all kinds of use. 4. All brake fluid parts must be able to stand 3,000 psi. The brake fluid tap must be made to the master cylinder port supplying fluid to the rear brakes. Copper tubing is subject to fatigue failure and must not be used. 5. Before going down a steep or long grade, they should reduce speed and shift the transmission into a lower gear to control the car's speed. They should also avoid holding the brake pedal down too long or too often. This could cause the brakes to get hot and not work as well.

Hitches. To help avoid personal injury due to sway caused by such things an crosswinds, big trucks passing, road roughness or the separation of the trailer, inform your customers that: 1. A properly installed and adjusted frame mounted weight-distributing hitch and sway control with enough capacity are required for trailers over 2,000 pounds loaded weight. 2. If their car has spring air bags or air shocks, they should keep them at minimum pressure of 10 to 15 psi when installing, adjusting or when towing with a weight-distributing hitch. 3. They should keep the trailer tonque load at 10% the loaded trailer weight for dead-weight hitches and 12% for weight distributing hitches. Tongue loads can be adjusted by proper distribution of the load in the trailer. This can be checked by weighing separately the loaded trailer and then the tongue. 4. They should not use axle-mounted hitches. They can damage the axle housing, wheel bearings, wheels or tires. 5. When they remove a trailer hitch, mounting holes in the body should be sealed. This will prevent entry of exhaust fumes, dirt or water.

NOTICE: Be sure to tell your customers to use only trailer hitches which permit normal operation of the Energy Absorbing Bumper system. For example, a rigid fore and aft connection between the bumper and any other part of the car may increase damage in the event of a colision. Also, caution your customers to consult their Owner's Manual for additional trailer hitch restrictions, where applicable.

1983 PONTIAC TRAILER TOWING RECOMMENDATIONS

1983 PONTIAC MODELS 1000 2000 FIREBIRD FIREBIRD FIREBIRD (U.S.A.) S/E T/A ------------------- ---- ---- -------- -------- -------- 1.8L 2.5L EFI 5.0L EFI 4-cyl (LQ9) 4 bbl V-8 4-cyl (LH8) (LG4) 1.6L Engines 2 bbl 2.8L 2.8L 4-cyl (L17) 2 bbl 2 bbl 2.0L V-6 HO V-6 5.0L EFI (LC1) (LL1) Cross-Fire 4-cyl Injection (LQ5) 5.0L 4 bbl V-8 (LU5) V-8 (LG4)

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3.23 opt 3.23 opt Axle Ratios 3.62 opt 3.33 on LQ9 & on LQ9 No opt L17 only opt MV9 (3.23 no opt ratio LG4 LC1 only ratio 3.23 on LU5 with MD8 as LL1/LG4 std axle)

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Maximum Trailer 1000 lbs 1000 lbs 1000 lbs 2000 lbs Weight L4 & V-6 (V-6)

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Automatic Transmission Recommended Recommended Recommended* Recommended* (MX1)

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Power Available Available Standard Standard Steering (N41) (N40)

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Power Brakes (J50) Required Required Standard Standard

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Heavy-Duty Suspension Not Not Not Available (High Rate Available Available Available (WS6) Springs)

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Heavy-Duty Radiator Available Available Available Available (Cooling) (V08) (V01) (V08) (V08)

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IP Gage Not Available Available Package Available (U14) (U21) Standard

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Heavy-Duty Not Available Available Available Generator** Available (G99) (K99) (K99)

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Super Lift Shocks (G66) Not Not Not Not or Electronic Available Available Available Available Ride Control (Y98)

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Trailering Not Not Not Not Wire Harness Available Available Available Available

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Limited Slip Not Not Available Available Differential Available Available (G80) (G80)

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1983 PONTIAC MODELS (U.S.A.) PHOENIX 6000 6000 STE GRAND PRIX BONNEVILLE --------------- ------- ---- -------- ---------- ----------

Engines 2.5L 2 bbl 3.8L 2 bbl EFI 4-cyl (LR8) V-6 (LD5) +2.8L 2 bbl 2.8L 2 bbl V-6 (LH7) 5.0L 4 bbl V-6 (LE2) V-8 (LG4)

+2.8L 4.3L 5.7L V-8 2 bbl diesel diesel (LF9) HO V-6 V-6 (LH7) (LT7)

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Axle Ratios No opt 2.84 opt No opt 3.08 and 3.23 opt ratios on LR8 ratios with LD5 2.73 and 3.08 opt on LG4 2.73 opt on LF9

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1000 lbs 2.29 axle ratio 1000 lbs 4-cyl 2000 lbs V-8 Maximum Trailer 4-cyl 2000 lbs 2000 lbs 2.73 axle ratio Weight 2000 lbs V-6 gas 2000 lbs V-6 V-6 1000 lbs 4000 lbs V-8 diesel 3.08 axle ratio 3000 lbs V-6 5000 lbs V-8 3.23 axle ratio 4000 lbs V-6 diesel 2000 lbs (all)

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Automatic Transmission Recommended Standard Standard Standard Standard (MX1)

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Power Available Steering (N41) Standard Standard Standard Standard

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Power Brakes (J50) Required Standard Standard Standard Standard

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Heavy-Duty Suspension Available Available Not Available Available (High Rate +(F40) (F40) Available (F40) (F40) Springs)

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Heavy-Duty Available Available Not Available Available Radiator (V08) (V08) Available (V08) (V08) (Cooling)

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IP Gage Available Available Available Available Package (U17/U22) (U14) Standard (U14) (U14)

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Heavy-Duty Available Available Not Available Available Generator** (K81) (K81) Available (K73) (K73)

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Super Lift Shocks (G66) Available Available Y98 Available Available or Electronic (G66) (G66 & Y98) Standard (G66) (G66) Ride Control (Y98)

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Trailering Not Available Available Available Available Wire Harness Available (U89) (U89) (U89) (U89)

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Limited Slip Not Not Not Available Available Differential Available Available Available (G80) (G80)

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*NA LJ models * 4 speed auto (MD8) where available ** Code numbers for gasoline engine generators only Code numbers for optionl diesel generators differ + Std Phoenix SJ/6000 STE only

WHAT YOUR TRAILER-TOWING CUSTOMERS SHOULD KNOW WHEN ORDERING THEIR NEW 1984 PONTIACS

All 1984 Pontiacs are capable of towing up to 1,000 lbs. But since trailering enthusiasts often wish to pull heavier loads, Pontiac offers a list of available equipment to help them meet their varied trailering needs. Use the chart on the back side of this page to help your customers decide what equipment is best for them. They'll get just what they're after. And you'll get more satisfied customers. Plus, by using the information below on Trailering Considerations and Trailering Cautions, you can help answer many common questions your customers might have.

TRAILERING CONSIDERATIONS

New car break-in. Advise your customers to read the new car break-in instructions in their Owners Manual. Also, we recommend a new Pontiac be driven for 500 miles (800 kilometers) before trailer towing. During this initial break-in period, and for the first 500 miles (800 kilometers) of actual trailer towing, Pontiac owners should avoid full-throttle starts and speads over 50 mph (80 km/h). If a new engine, transmission, or axle is installed in the car, the same care should be observed.

Maintanance. Don't forget to tell your customers that more frequent service is required when using a car to pull a trailer. For example, all trailer hitch bolts and nuts should be checked occasionally for tightness. For other information regarding special maintenance requirements for trailers, direct your customers to their Owners Manual and Maintenance Schedule folder.

Engine cooling system. Advise your customers to follow these instructions: The coolant level should be checked when their car engine is cool, before starting on a trip. A temporary cooling system overload may be encountered on hot days when pulling on a long grade, when slowing down after higher speeds, or after long idle periods in heavy traffic. If overheating persists, their car should not be driven. And it should be checked by an authorized mechanic.

High altitude performance. An engine loses approximately 4% of its sea level performance for every 1,000 feet of altitude. An engine operating at 10,000 feet above level will lose approximately 40% of its performance. For pulling trailers at high altitudes, engines with higher sea level horsepower are recommended, as are higher axle ratios.

Tires. The tires furnished on 1983 Pontiacs are qualified for trailer towing. When towing trailer uaing a dead-weight hitch, tires should be inflated to the "Cold Tire Pressure" for "Maximum Load" shown on the tire placard attached on the left front door. For trailers using weight-distributing hitches, increase front tire pressure 2 psi above the "Cold Tire Pressure" for "Maximum Load" shown on the tire placard. This increase should never exceed maximum pressure shown on side of tire.

NOTE: The allowable passenger and cargo load for cars also shown on the same placard is reduced by the tongue weight whenever the trailer in attached to the car.

Before starting a trip. Tell customers to check lights, tires and mirror adjustment. And to check car and trailer brakes before turning into traffic.

Downgrades and long uphill grades. Speed should be reduced and lower transmission gear used to assist braking on long or steep down-grades. Transmission should be downshifted to a lower gear and speed reduced to 45 mph (70 km/h) or below on long uphill grades to reduce possibility of engine overheating. For normal towing with 4-speed automatic transmission, we recommand that you select 3rd gear instead of overdrive.

TRAILERING CAUTIONS

Brakes. To help avoid personal injury due to poor braking action, your customers should know that: 1. Trailer brakes of adequate size are required on trailers over 1,000 pounds loaded weight. 2. If trailer brakes are used with the car, follow the installation and balance instructions of the trailer brake maker. 3. They should not tap into the car's brake system if the trailer brake system uses more than 0.02 cubic inch of fluid from the car's master cylinder. In this case, the car's brake fluid capacity will not be enough to operate both the car and trailer brakes under all kinds of use. 4. All brake fluid parts must be able to stand 3,000 psi. The brake fluid tap must be made to the master cylinder port supplying fluid to the rear brakes. Copper tubing is subject to fatigue failure and must not be used. 5. Before going down a steep or long grade, they should reduce speed and shift the transmission into a lower gear to control the car's speed. They should also avoid holding the brake pedal down too long or too often. This could cause the brakes to get hot and not work as well.

Hitches. To help avoid personal injury due to sway caused by such things an crosswinds, big trucks passing, road roughness or the separation of the trailer, inform your customers that: 1. A properly installed and adjusted frame mounted weight-distributing hitch and sway control with enough capacity are required for trailers over 2,000 pounds loaded weight. 2. If their car has spring air bags or air shocks, they should keep them at minimum pressure of 10 to 15 psi when installing, adjusting or when towing with a weight-distributing hitch. 3. They should keep the trailer tonque load at 10% the loaded trailer weight for dead-weight hitches and 12% for weight distributing hitches. Tongue loads can be adjusted by proper distribution of the load in the trailer. This can be checked by weighing separately the loaded trailer and then the tongue. 4. They should not use axle-mounted hitches. They can damage the axle housing, wheel bearings, wheels or tires. 5. When they remove a trailer hitch, mounting holes in the body should be sealed. This will prevent entry of exhaust fumes, dirt or water.

NOTICE: Be sure to tell your customers to use only trailer hitches which permit normal operation of the Energy Absorbing Bumper system. For example, a rigid fore and aft connection between the bumper and any other part of the car may increase damage in the event of a colision. Also, caution your customers to consult their Owner's Manual for additional trailer hitch restrictions, where applicable.

1984 PONTIAC MODELS Fiero 1000 2000 FIREBIRD FIREBIRD TRANS AM (U.S.A.) S/E ------------ ----- ---- ---- -------- -------- --------

2.5L 1.8L 2.5L EFI 5.0L 4 cyl EFI 4-cyl (LQ9) 4 bbl V-8 EFI (LR8) 4-cyl (LH8) (LG4) 1.6L Engines 2 bbl 2.8L 2.8L 4-cyl (L17) 2 bbl 2 bbl 2.0L V-6 HO V-6 5.0L EFI (LC1) (LL1) V8 (L69) 4-cyl (LQ5) & 5.0L 4 bbl 4 cyl Turbo V-8 (LG4) (LA5) -----------------------------------------------------------------------------

No opt. 3.23 opt 3.23 opt Axle Ratios Axle 3.62 opt 3.43 on LQ9 & on LQ9 (only Auto. L17 only (LH8 MV9 (3.23 no opt Trans. only) LC1 only ratio 3.23 on LG4 Listed) with MD8 as LL1/LG4 only std axle)

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Maximum 1000 lbs 1000 lbs 1000 lbs 1000 lbs 2000 lbs Trailer Not Recom. Not Recom. L4 & V-6 (V-8) Weight for LR8* for LA5 Not Recom. for L69* -----------------------------------------------------------------------------

Automatic Recommended Transmission Recommended Recommended Recommended Recommended (MX1)

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Power Not Available Available Standard Standard Steering Available (N41) (N40)

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Power Recommended Brakes Required Required Standard Standard (J50) -----------------------------------------------------------------------------

Heavy-Duty Available Suspension (WS6) Not Not Not Available (High Rate Available Available Available (WS6) Springs)

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Heavy-Duty Available* Radiator (V08) Not (Cooling) Available Available(A) Available Available (V01) (V08) (V08)#

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IP Gage Standard Not Available Available(D) Package Available (U14/21) (U21) Standard

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Heavy-Duty Not Not Not Not Not Generator** Avail. Available Available Available Available

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Super Lift Shocks (G66) Not Not Not Not or Electronic Not Available Available Available Available Ride Control Available (Y98)

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Trailering Not Not Not Not Not Wire Harness Avail. Available Available Available Available

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Limited Slip Not Not Not Available Available Differential Avail. Available Available (G80) (G80)

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1984 PONTIAC MODELS (U.S.A.) PHOENIX 6000 GRAND PRIX BONNEVILLE PARISIENNE --------------- ------- ---- ---------- ---------- ----------

Engines 2.5L 2 bbl 3.8L 2 bbl 3.8L 2 bbl EFI 4-cyl (LR8) V-6 (LD5) V6 (LC3)

2.8L 2 bbl 5.0L 4 bbl 5.0L 4 bbl V-6 (LE2) V-8 (LG4) V8 (LG4)

+2.8L 4.3L 5.7L V-8 5.7L V-8 2 bbl diesel diesel (LF9) diesel (LF9) HO V-6 V-6 (LH7) (LT7)

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Axle Ratios No opt 2.84 opt 3.08 and 3.23 opt 2.73 and 3.23 ratios on LR8 with LD5 opt with LC3 2.73 and 3.08 opt 3.08 opt with on LG4 LG4 2.73 opt on LF9 2.93 opt with LF9 -----------------------------------------------------------------------------

1000 lbs 2.41 axle ratio 2000 lbs -All 1000 lbs 4-cyl 1000 lbs V-6 V-6 Maximum Trailer 4-cyl 2000 lbs 3.08 axle ratio 3000 lbs- V-8 Weight 2000 lbs V-6 gas 2000 lbs V-6 with 2.73 axle V-6 1000 lbs 2.29 axle ratio 4000 lbs- V-8 diesel 2000 lbs V-8 with 3.08 axle 2.73 axle ratio 1000 lbs- V-8 4000 lbs V-8 diesel 3.23 axle ratio 3000 lbs (V-6) diesel 1000 lbs (all)

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Automatic Transmission Recommended Standard Standard Standard Standard (MX1)

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Power Available Steering (N41) Standard Standard Standard Standard

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Power Brakes (J50) Required Standard Standard Standard Standard

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Heavy-Duty Suspension Not Not Not Not Available(2) (High Rate Available Available Available Available (F40) Springs)

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Heavy-Duty Available Available(B) Available Available Available Radiator (V08) (V08) (V08) (V08) (V08) (Cooling)

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IP Gage Available Available Available Available Available Package (U17/U22) (U14/21) (U14/21) (U14/21) (UF7)

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Heavy-Duty Available Available Available Available Not Generator** (K64) (K81) (K64/99) (K64/99) Available

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Super Lift Not Shocks (G66) Available Available Available Available Available or Electronic (G66 & Y98) (G66) (G66) (G66 Wgn Ride Control only) (Y98)

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Trailering Not Available Available Available Available Wire Harness Available (U89) (U89) (U89) (U94)

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Limited Slip Not Not Available Available Available Differential Available Available (G80) (G80) (G80)

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(A) Not Available LA5 (B) Not Available 6000 STE (C) Standard 6000 STE (D) Standard Firebird S/E

* Unless Air conditioning deleted and Heavy-duty radiator included ** Code numbers for gasoline engine generators only Code numbers for optional diesel generators differ

+ Std Phoenix SE ++ Standard on L69 # Not available L69 (1) Trailer towing not recommended for 6000 STE (2) Standard on Parisienne Station Wagon

WHAT YOUR TRAILER-TOWING CUSTOMERS SHOULD KNOW WHEN ORDERING THEIR NEW 1985 PONTIACS

All 1985 Pontiacs are capable of towing up to 1,000 lbs. But since trailering enthusiasts often wish to pull heavier loads, Pontiac offers a list of available equipment to help them meet their varied trailering needs. Use the chart on the back side of this page to help your customers decide what equipment is best for them. They'll get just what they're after. And you'll get more satisfied customers. Plus, by using the information below on Trailering Considerations and Trailering Cautions, you can help answer many common questions your customers might have.

TRAILERING CONSIDERATIONS

New car break-in. Advise your customers to read the new car break-in instructions in their Owners Manual. Also, we recommend a new Pontiac be driven for 500 miles (800 kilometers) before trailer towing. During this initial break-in period, and for the first 500 miles (800 kilometers) of actual trailer towing, Pontiac owners should avoid full-throttle starts and speads over 50 mph (80 km/h). If a new engine, transmission, or axle is installed in the car, the same care should be observed.

Maintanance. Don't forget to tell your customers that more frequent service is required when using a car to pull a trailer. For example, all trailer hitch bolts and nuts should be checked occasionally for tightness. For other information regarding special maintenance requirements for trailers, direct your customers to their Owners Manual and Maintenance Schedule folder.

Engine cooling system. Advise your customers to follow these instructions: The coolant level should be checked when their car engine is cool, before starting on a trip. A temporary cooling system overload may be encountered on hot days when pulling on a long grade, when slowing down after higher speeds, or after long idle periods in heavy traffic. If overheating persists, their car should not be driven. And it should be checked by an authorized mechanic.

High altitude performance. An engine loses approximately 4% of its sea level performance for every 1,000 feet of altitude. An engine operating at 10,000 feet above level will lose approximately 40% of its performance. For pulling trailers at high altitudes, engines with higher sea level horsepower are recommended, as are higher axle ratios.

Tires. The tires furnished on 1983 Pontiacs are qualified for trailer towing. When towing trailer uaing a dead-weight hitch, tires should be inflated to the "Cold Tire Pressure" for "Maximum Load" shown on the tire placard attached on the left front door. For trailers using weight-distributing hitches, increase front tire pressure 2 psi above the "Cold Tire Pressure" for "Maximum Load" shown on the tire placard. This increase should never exceed maximum pressure shown on side of tire.

NOTE: The allowable passenger and cargo load for cars also shown on the same placard is reduced by the tongue weight whenever the trailer in attached to the car.

Before starting a trip. Tell customers to check lights, tires and mirror adjustment. And to check car and trailer brakes before turning into traffic.

Downgrades and long uphill grades. Speed should be reduced and lower transmission gear used to assist braking on long or steep down-grades. Transmission should be downshifted to a lower gear and speed reduced to 45 mph (70 km/h) or below on long uphill grades to reduce possibility of engine overheating. For normal towing with 4-speed automatic transmission, we recommand that you select 3rd gear instead of overdrive.

TRAILERING CAUTIONS

Brakes. To help avoid personal injury due to poor braking action, your customers should know that: 1. Trailer brakes of adequate size are required on trailers over 1,000 pounds loaded weight. 2. If trailer brakes are used with the car, follow the installation and balance instructions of the trailer brake maker. 3. They should not tap into the car's brake system if the trailer brake system uses more than 0.02 cubic inch of fluid from the car's master cylinder. In this case, the car's brake fluid capacity will not be enough to operate both the car and trailer brakes under all kinds of use. 4. All brake fluid parts must be able to stand 3,000 psi. The brake fluid tap must be made to the master cylinder port supplying fluid to the rear brakes. Copper tubing is subject to fatigue failure and must not be used. 5. Before going down a steep or long grade, they should reduce speed and shift the transmission into a lower gear to control the car's speed. They should also avoid holding the brake pedal down too long or too often. This could cause the brakes to get hot and not work as well.

Hitches. To help avoid personal injury due to sway caused by such things an crosswinds, big trucks passing, road roughness or the separation of the trailer, inform your customers that: 1. A properly installed and adjusted frame mounted weight-distributing hitch and sway control with enough capacity are required for trailers over 2,000 pounds loaded weight. 2. If their car has spring air bags or air shocks, they should keep them at minimum pressure of 10 to 15 psi when installing, adjusting or when towing with a weight-distributing hitch. 3. They should keep the trailer tonque load at 10% the loaded trailer weight for dead-weight hitches and 12% for weight distributing hitches. Tongue loads can be adjusted by proper distribution of the load in the trailer. This can be checked by weighing separately the loaded trailer and then the tongue. 4. They should not use axle-mounted hitches. They can damage the axle housing, wheel bearings, wheels or tires. 5. When they remove a trailer hitch, mounting holes in the body should be sealed. This will prevent entry of exhaust fumes, dirt or water.

NOTICE: Be sure to tell your customers to use only trailer hitches which permit normal operation of the Energy Absorbing Bumper system. For example, a rigid fore and aft connection between the bumper and any other part of the car may increase damage in the event of a colision. Also, caution your customers to consult their Owner's Manual for additional trailer hitch restrictions, where applicable.

1985 PONTIAC MODELS Fiero 1000 2000 FIREBIRD FIREBIRD TRANS AM (U.S.A.) S/E ------------ ----- ---- ---- -------- -------- --------

2.5L 1.6L 1.8L EFI 2.5L EFI 2.8L PFI 5.0L 4bbl 4 cyl 2 bbl 4 cyl (LH8) 4 cyl HO V6 V8 (LG4) EFI (LR8) 4 cyl and 4 cyl (LQ9) (LB8) (L17) Turbo (LA5) Engines 2.8L PFI 5.0L 4bbl 5.0L 2.8L HO V6 (LB8) V8 (LG4) V8 (L69) V-6 (L44) 5.0L 4 bbl 5.0L V8 (LG4) V8 PFI (LB9) -----------------------------------------------------------------------------

Axle Ratios No opt 3.62 opt No opt 3.45:1 on (only Auto. Axle L17 only Axle (LB9) only Trans. Listed)

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Maximum 1000 lbs Not 1000 lbs 1000 lbs 2000 lbs Trailer Recommended Not (L4 & V6) (V-8) Weight Recommended Not for LA5 Recommended for L69* or LB9* -----------------------------------------------------------------------------

Automatic Recommended Transmission Recommended Recommended Recommended Recommended (MX1)

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Power Not Available Available Standard Standard Steering Available (N41) (N40)

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Power Recommended Brakes Required Required Standard Standard (J50) -----------------------------------------------------------------------------

Heavy-Duty Suspension Not Not Not Not Not (High Rate Available Available Available Available Available Springs)

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Heavy-Duty Available* Radiator (V08)+ Not Not Available Available (Cooling) Available Available (V08) (V08)#

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IP Gage Standard Not Available Available(C) Package Available (U14/21) (U21) Standard

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Heavy-Duty Not Not Not Not Not Generator** Avail. Available Available Available Available

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Super Lift Shocks (G66) Not Not Not Not or Electronic Not Available Available Available Available Ride Control Available (Y98)

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Trailering Not Not Not Not Not Wire Harness Avail. Available Available Available Available

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Limited Slip Not Not Not Available Available Differential Avail. Available Available (G80) (G80)

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1985 PONTIAC MODELS (U.S.A.) GRAND AM 6000 GRAND PRIX BONNEVILLE PARISIENNE --------------- -------- ---- ---------- ---------- ----------

Engines 2.5L 2bbl 2.5L 3.8L 2 bbl 4.3L TBI EFI 4-cyl L4 EFI V6 (LD5) V6 (LB4)(3) (LR8) (LR8)

3.0L MPFI 2.8L V6 (LN7) 2bbl V6 (LE2) 5.0L 4 bbl 5.0L 4 bbl V8 (LG4) V8 (LG4) 2.8L PFI V6 (LB6)

4.3L 5.7L V8 diesel diesel (LF9) V6 (LT7)

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Axle Ratios No opt 2.84 (L4) 2.73, 3.08 & 3.08 opt with ratios 3.06 & 3.18 3.23 opt with LB4 (V6)0 LD5 3.08 opt with 3.08 opt on LG4 LG4 2.73 opt on LF9 2.93 opt with LF9

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1000 lbs 2.41 axle ratio 1000 lbs 4-cyl 1000 lbs V-6 2.56 axle V6 Maximum Trailer Not 2000 lbs(1) 3.08 axle ratio & all diesel; Weight Recommended V-6 gas 2000 lbs V-6 2000 lbs 1000 lbs 2.41 axle ratio 3.08 axle V6 diesel 2000 lbs V-8 2.56 axle V8; 2.73 axle ratio 3000 lbs 1000 lbs V-6 2.73 axle V8; 3.23 axle ratio 4000 lbs 3000 lbs (V-6) 3.08 axle V8 3.08 axle ratio 4000 lbs (V-8) 2.56 axle ratio 2000 lbs (V-8)

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Automatic Transmission Recommended Standard(0) Standard Standard Standard (MX1)

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Power Steering Standard Standard Standard Standard Standard

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Power Brakes (J50) Required Standard Standard Standard Standard

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Heavy-Duty Suspension Not Not Not Not Available(2) (High Rate Available Available Available Available (F40) Springs)

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Heavy-Duty Not Available(A) Available Available Available Radiator Available (V08) (V08) (V08) (V08) (Cooling)

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IP Gage Available Available(B) Available Available Available Package (U14) (U21) (U14/21) (U14/21) (UF7)

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Heavy-Duty Available Available Available Available Not Generator** (K64/K81) (K64/99) (K64/99) Available

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Super Lift Not Shocks (G66) Available Available Available Available Available or Electronic (G66 & Y98) (G66) (G66) (G66 Wgn Ride Control only) (Y98)

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Trailering Not Not Not Not Available Wire Harness Available Available Available Available (U94)

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Limited Slip Not Not Available Available Available Differential Available Available (G80) (G80) (G80)

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Note: For hitch attachment recommendations refer to Owner's Manual

(A) Now Available 6000 STE (B) Standard 6000 STE (C) Standard Firebird SE

* Unless Air Conditioning deleted ** Code numbers for gasoline engine generators only Code numbers for optional diesel generators differ

+ Available LR8 only ++ Standard on L69 # Not Available L69/LB9

(1) Trailer towing not recommended for 6000 STE (2) Standard on Parisienne Wagon (3) NA on Parisienne Wagon

0 Both MD9 & ME9 trans available - final drive ratio vary by model.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.