CAMPAIGN:BRAKE FLUID LEAK AT THE FRONT BRAKE CALIPERS

SUBJECT: BRAKE FLUID LEAKS AT THE FRONT BRAKE CALIPERS

MODELS: 1994 GMC FORWARD AND CHEVROLET TILTMASTER W4 SERIES WITH GAS ENGINES

THIS BULLETIN CANCELS AND REPLACES BULLETIN 94-C-19 ISSUED MAY 1994. ALL COPIES OF 94-C-19 SHOULD BE DESTROYED. ADDITIONAL VEHICLES HAVE BEEN ADDED TO THE AFFECTED POPULATION.

The National Traffic and Motor Vehicle Safety Act, as amended, provides that each vehicle which is subject to a recall campaign of this type must be adequately repaired within a reasonable time after the owner has tendered it for repair. A failure to adequately repair within 60 days after tender of a vehicle is prima facie evidence of failure to repair within a reasonable time.

If the condition is not adequately repaired within a reasonable time, the owner may be entitled to an identical or reasonably equivalent vehicle at no charge, or to a refund of the purchase price less a reasonable allowance for depreciation.

To avoid having to provide these burdensome solutions, every effort must be made to promptly schedule appointments with owners and to repair their vehicles as soon as possible. As you will see in reading the attached copy of the letter which is being sent to owners, the owner is being instructed to contact the GMC Truck Division Consumer Relations Office if the dealer does not remedy the condition within five days of the mutually agreed upon service date. If the condition is not remedied within a reasonable time, they are instructed how to contact the National Highway Traffic Safety Administration.

DEFECT INVOLVED

General Motors has determined that a defect, which relates to motor vehicle safety, exists in CERTAIN 1994 GMC Forward and Chevrolet Tiltmaster W4 Series vehicles equipped with gas engines. A condition exists where the front axle brake calipers may leak brake fluid at the flexible hose connection to the caliper. The caliper eye bolt sealing surface on the front brake calipers were covered by paint residue caused by incomplete masking during painting prior to delivery to the assembly line. At the assembly line, the hydraulic brake hose was attached with an eye-bolt and gaskets to this sealing surface. After assembly of the vehicle, brake fluid gradually dissolves the paint residue and may open a small path between the sealing surface and the gasket allowing brake fluid leakage when the brakes are applied. Brake fluid leakage could redue brake effectiveness and increase stopping distances. Partial loss of braking at a time when minimum stopping distance is required could result in a vehicle crash without prior warning.

To correct this condition, dealers must disconnect the front brake flex hose, remove any paint from the caliper eye-bolt mounting surface and reconnect the brake hose using a new copper gasket on each side of the eye-bolt. (2 per caliper/4 per vehicle).

VEHICLES INVOLVED

Involved are CERTAIN vehicles 1994 GMC Forward and Chevrolet Tiltmaster W4 Series vehicles equipped with gas engines listed below,

NOTE: Following groups of VIN's are original VIN's involved.

SHIP TO SHIP TO DEALER DEALER CODE VIN CODE VIN ------- --- ------- --- 1303557 4KBB4B1A3RJ000084 4810083 4KDB4B1A7RJ000063 1304375 4KBB4B1A5RJ000006 4KDB4B1A6RJ000068 1306417 4KBB4B1A4RJ000014 4821041 4KDB4B1AXRJ000011 1311337 4KBB4B1A6RJ000483 4KDB4B1A9RJ000047 4KBB4B1A8RJ000484 4KDB4B1A0RJ000048 1318392 4KBB4B1A2RJ000173 4821389 4KDB4B1A9RJ000016 1320039 4KBB4B1A6RJ000256 4KDB4B1A7RJ000077 1320271 4KBB4B1A1RJ000049 4KDB4B1A9RJ000078 1325037 4KBB4B1AXRJ000034 4821407 4KDB4B1AXRJ000073 1326358 4KBB4B1A3RJ000487 4826453 4KDB4B1AXRJ000039 4KBB4B1A5RJO00488 4830011 4KDB4B1A7RJ000032 1332503 4KBB4B1A5RJO00071 4830200 4KDB4B1A4RJ000036 4KBB4B1A7RJ000072 4840102 4KDB4B1A2RJ000469 4KBB4B1A2RJ000481 4840146 4KDB4B1A3RJ000061 4KBB4B1A4RJ000482 4840379 4KDB4B1A3RJ000030 1339088 4KBB4B1A0RJ000026 4842005 4KDB4B1A1RJ000060 4KBB4B1A2RJ000027 4KDB4B1A6RJ000121 1344565 4KBB4B1A4RJ000076 4842161 4KDB4B1A7RJ000029 1347159 4KBB4B1AXRJ000003 4KDB4B1A5RJ000062 4KBB4B1A7RJ000024 4842163 4KDB4B1A4RJ000005 4KBB4B1A4RJ000059 4KDB4B1AXRJ000025 4KBB4B1A6RJ000080 4KDB4B1A8RJ000122 4KBB4B1A1RJ000178 4KDB481AXRJ000008 1347628 4KBB4B1A0RJ000012 4842292 4KDB4B1A5RJ000174 4KBB4B1A0RJ000057 4850524 4KDB4B1A1RJ000074 1362881 4KBB4B1A0RJ000009 4854688 4KDB4B1A2RJ000035 4KBB4B1A8RJ000176 4856476 4KDB4B1A2RJ000004 1367017 4KBB4B1AXRJ000132 4KDB4B1A8RJ000038 1367187 4KBB4B1A2RJ000075 4KDB4B1A5RJ000045 4KBB4B1A8RJ000081 4KDB4B1A3RJ000058 1367960 4XBB4B1AXRJ000485 4KDB4B1A0RJ000079 4KBB4B1A1RJ000486 4KDB4B1A2RJ000083 4806207 4KDB4B1A0RJ000065 4856967 4KDB4B1A4RJ000067 4KDB4B1A2RJ000066

NOTE: The following VIN's are additional VIN's involved.

SHIP TO SHIP TO DEALER DEALER CODE VIN CODE VIN -------------------------------------------------------------------- 1320107 4KBB4B1A7RJ000721 1303557 4KBB4B1A0RJ001158 4KBB4B1A9RJ000882 1304375 4KBB4B1A4RJ001471 4KBB4B1A0RJ000883 1305074 4KBB4B1A8RJ000906 4KBB4B1A2RJ001159 1305144 4KBB4B1A8RJ001215 1320271 4KBB4B1A8RJ001019 4KBB4B1AXRJ001216 1324018 4KBB4B1A5RJ000605 1306417 4KBB4B1A0RJ000608 1325467 4KBB4B1A1RJ000715 4KBB4B1A4RJ000613 4KBB4B1A5RJ000734 4KBB4B1A7RJ000704 4KBB4B1A7RJ001058 4KBB4B1A6RJ001021 4KBB4B1A5RJ001589 4KBB4B1A5RJ001026 4KBB4B1A2RJ001761 1307274 4KBB4B1A5RJ001379 1326326 4KBB4B1A3RJ001011 1308276 4KBB4B1A5RJ000619 1326358 4KBB4B1A3RJ000604 1311056 4KBB4B1AXRJ000714 1326424 4KBB4B1A7RJ000752 4KBB4B1A9RJ001224 4KBB4B1A9RJ000753 1315247 4KBB4B1A7RJ001271 4KBB4B1A8RJ001179 1315427 4KBB4B1A7RJ001318 4KBB4B1A9RJ001465 1315521 4KBB4B1A2RJ001226 4KBB4B1A9RJ001479 1316062 4KBB4B1A6RJ000998 1330257 4KBB4B1A9RJ001126 1316106 4KBB4B1A3RJ001185 1330360 4KBB4B1A1RJ001055 1316225 4KBB4B1A4RJ000692 4KBB4B1A7RJ001108 4KBB4B1A6RJ000919 4KBB4B1A7RJ001223 4KBB4B1A6RJ001469 1332090 4KBB4B1A6RJ000953 1316472 4KBB4B1A5RJ001107 1332196 4KBB4B1A4RJ000904 1316507 4KBB4B1A8RJ001375 1332385 4KBB4B1A8RJ001084 1316543 4KBB4B1A0RJ000611 1332503 4KBB4B1A8RJ000694 4KBB4B1A1RJ001105 4KBB4B1AXRJ000695 1316551 4KBB4B1A3RJ001400 4KBB4B1A1RJ000696 1316696 4KBB4B1A2RJ001176 4KBB4B1AXRJ000731 1318065 4KBB4B1A4RJ001082 4KBB4B1A8RJ000954 4KBB4B1AXRJ001474 4KBB4B1A0RJ001760 1319055 4KBB4B1A5RJ001186 1339088 4KBB4B1AXRJ000602 1320039 4KBB4B1A7RJ000914 4KBB4B1A2RJ001324 4KBB4B1A4RJ000997 4KBB4B1AXRJ001328 4KBB4B1A4RJ001177 4KBB4B1A1RJ001587 4KBB4B1A6RJ001181

SHIP TO SHIP TO DEALER DEALER CODE VIN CODE VIN --------------------------------------------------------------------- 133922 4KBB4B1A7RJ001187 4806280 4KDB4B1A4RJ000649 1344348 4KBB4B1A5RJ001284 4KDB4B1A6RJ000782 1344384 4KBB4B1AXRJ001121 4KDB4B1AXRJ000784 1344388 4KBB4B1A4RJ000952 4KDB4B1A1RJ000785 1344550 4KBB4B1A1RJ001279 4KDB4B1A5RJ000787 1344565 4KBB4B1A5RJ001060 4KDB4B1A5RJ001454 4KBB4B1A1RJ001122 4KDB4B1A7RJ001455 1347159 4KBB4B1A6RJ001052 4KDB4B1A2RJ001458 1347420 4KBB4B1A4RJ000918 4KDB4B1A4RJ001459 4KBB4B1A7RJ001268 4KDB4B1A9RJ001599 1347628 4KBB4B1A6RJ001388 4KDB4B1A1RJ001600 4806007 4KDB4B1A9RJ000730 4KDB4B1A3RJ001601 4KDB4B1A4RJ001171 4KDB4B1A5RJ001602 4806024 4KDB4B1A2RJ000701 4KDB4B1A7RJ001603 4806057 4KDB4B1A3RJ000626 4KDB4B1A9RJ001604 4KDB4B1A9RJ000629 4KDB4B1A0RJ001605 4KDB4B1A5RJ000708 4KDB4B1A0RJ001765 4KDB4B1A3RJ000710 4806295 4KDB4B1A7RJ000614 4806083 4KDB4B1A2RJ001088 4KDB4B1A4RJ000702 4KDB4B1A3RJ001405 4KDB4B1A6RJ000703 4KDB4B1A5RJ001406 4KDB4B1A1RJ000706 4KDB4B1AXRJ001482 4KDB4B1A3RJ000707 4KDB4B1A1RJ001516 4KDB4B1A6RJ001172 4806104 4KDB4B1A5RJ000675 4KDB4B1A1RJ001466 4KDB4B1A0RJ000728 4806301 4KDB4B1A0RJ001376 4KDB4B1A9RJ001246 4806317 4KDB4B1A0RJ000650 4806113 4KDB4B1A9RJ000758 4KDB4B1A9RJ000727 4806207 4KBD4B1AXRJ000624 4KDB4B1A2RJ000732 4KDB4B1A4RJ000697 4KDB4B1A7RJ000967 4KDB4B1A0RJ000700 4KDB4B1A0RJ001085 4KDB4B1A0RJ000907 4KDB4B1A4RJ001476 4KDB4B1A3RJ000920 4KDB4B1A6RJ001477 4806212 4KDB4B1A2RJ001377 4806543 4KDB4B1A8RJ001321 4KDB4B1AXRJ001501 4810076 4KDB4B1A0RJ001023 4KDB4B1A3RJ001503 4KDB4B1A6RJ001382 4806273 4KDB4B1A1RJ001127

SHIP TO SHIP TO DEALER DEALER CODE VIN CODE VIN --------------------------------------------------------------------- 4810123 4KDB4B1A3RJ000612 4826596 4KDB4B1A9RJ000713 4KDB4B1A9RJ000680 4KDB4B1A4RJ000716 4810141 4KDB4B1A2RJ001363 4KDB4B1A0RJ000955 4810299 4KDB4B1A4RJ000635 4KDB4B1A2RJ000956 4810356 4KDB4B1A2RJ000908 4KDB4B1A6RJ000958 4810357 4KDB4B1A2RJ000911 4KDB4B1AXRJ001014 4810500 4KDB4B1A9RJ000677 4KDB4B1A2RJ001217 4KDB4B1A0RJ000678 4KDB4B1A4RJ001218 4810501 4KDB4B1A9RJ000999 4KDB4B1A6RJ001219 4KDB4B1AXRJ001000 4KDB4B1A5RJ001437 4810684 4KDB4B1A9RJ001117 4KDB4B1A9RJ001439 4818030 4KDB4B1A5RJ000921 4KDB4B1A5RJ001440 4818084 4KDB4B1A4RJ001283 4830200 4KDB4B1A4RJ001378 4821017 4KDB4B1A2RJ001394 4840015 4KDB4B1A4RJ001154 4821041 4KDB4B1A7RJ000709 4840035 4KDB4B1A2RJ001153 4KDB4B1A3RJ001369 4840093 4KDB4B1A4RJ000683 4KDB4B1A2RJ001590 4KDB4B1A6RJ000880 4KDB4B1A4RJ001591 4KDB4B1A8RJ000881 4KDB4B1AXRJ001594 4840102 4KDB4B1A1RJ000673 4821212 4KDB4B1A7RJ001116 4KDB4B1A8RJ000718 4821217 4KDB4B1A0RJ000745 4KDB4B1A6RJ000720 4KDB4B1A4RJ000750 4KDB4B1A4RJ000795 4KDB4B1A5RJ000756 4KDB4B1A8RJ000797 4821343 4KBD4B1A5RJ001180 4KDB4B1A3RJ000917 4821362 4KDB4B1A4RJ000621 4KDB4B1A3RJ001114 4KDB4B1A1RJ001323 4KDB4B1AXRJ001272 4821378 4KDB4B1A2RJ001380 4KDB4B1A7RJ001309 4826034 4KDB4B1AXRJ001269 4KDB4B1A5RJ001468 4826035 4KDB4B1A1RJ000656 4KDB4B1A3RJ001470 4KDB4B1A9RJ001411 4KDB4B1A7RJ001472 4KDB4B1A5RJ001485 4840146 4KDB4B1A3RJ001002 4826184 4KDB4B1A4RJ000957 4840159 4KDB4B1A3RJ000609 4KDB4B1A3RJ001016 4KDB4B1AXRJ000610 4826309 4KDB4B1A6RJ001267 4840200 4KDB4B1A1RJ000723 4826351 4KDB4B1A7RJ001424 4KDB4B1A3RJ000724 4826453 4KDB4B1A8RJ000735 4840216 4KDB4B1AXRJ001160 4KDB4B1A9RJ001280 4KDB4B1A3RJ001162

4840379 4KDB4B1AXRJ000901 4842163 4KDB4B1A2RJ000665 4KDB4B1A7RJ001083 4KDB4B1A5RJ000885 4KDB4B1A6RJ001236 4KDB4B1A9RJ000923 4840403 4KDB4B1A9RJ001182 4KDB41A0RJ0001054 4KDB4B1A6RJ001415 4KDB4B1A4RJ001056 4840480 4KDB4B1A9RJ001053 4KDB4B1A4RJ001106 4842005 4KDB4B1AXRJ001322 4KDB4B1A5RJ001275 4KDB4B1A3RJ001386 4KDB4B1A6RJ001480 4842046 4KDB4B1A2RJ001119 4KDB4B1A8RJ001481 4842076 4KDB4B1A5RJ000711 4KDB4B1A6RJ001513 4KDB4B1A9RJ001327 4KDB4B1A8RJ001514 4842114 4KDB4B1A5RJ001163 4KDB4B1AXRJ001515 4842161 4KDB4B1A1RJ000687 4KDB4B1AXRJ001756 4KDB4B1A5RJ000689 4842217 4KDB4B1A1RJ000737 4KDB4B1A6RJ000698 4KDB4B1A3RJ000738 4KDB4B1A8RJ000699 4KDB4B1A3RJ000741 4KDB4B1AXRJ000798 4842240 4KDB4B1A1RJ001130 4KDB4B1A6RJ000801 4KDB4B1A7RJ001164 4KDB4B1A7RJ000922 4KDB4B1A9RJ001165 4KDB4B1A0RJ000924 4KDB4B1A0RJ001166 4KDB4B1A6RJ001009 4KDB4B1A2RJ001167 4KDB4B1A2RJ001010 4KDB4B1A2RJ001234 4KDB4B1A1RJ001015 4KDB4B1A6RJ001317 4KDB4B1A7RJ001018 4KDB4B1A8RJ001691 4KDB4B1A6RJ001110 4842276 4KDB4B1A6RJ001155 4KDB4B1A8RJ001111 4842292 4KDB4B1A2RJ001170 4KDB4B1AXRJ001112 4844510 4KDB4B1A4RJ001266 4KDB4B1A1RJ001113 4844555 4KDB4B1A9RJ001120 4KDB4B1A0RJ001233 4847558 4KDB4B1A5RJ000725 4KDB4B1A1RJ001273 4847645 4KDB4B1AXRJ001109 4KDB4B1A3RJ001274 4847650 4KDB4B1A5RJ001373 4KDB4B1A4RJ001607 4850148 4KDB4B1A3RJ001050 4KDB4B1A6RJ001608 4KDB4B1A5RJ001051 4KDB4B1A5RJ001762 4851075 4KDB4B1A8RJ000623 4KDB4B1A7RJ001763 4853037 4KDB4B1AORJ000793 4KDB4B1A9RJ001764 4KDB4B1A4RJ001512 4842163 4KDB4B1A6RJ000622 4853184 4KDB4B1A4RJ001316 4KDB4B1A0RJ000664

The specific vehicles involved in this campaign have been identified by Vehicle Identification Number (VIN) Computer Listings. These listings are furnished to all involved dealers with the campaign. Dealers should confirm vehicle eligibility through VISS (Vehicle Information Service System) or SERVICENET prior to beginning campaign repairs.

DEALER CAMPAIGN RESPONSIBILITY

All unsold new vehicles in dealers' possession and subject to this campaign MUST be held and inspected/repaired per the SERVICE PROCEDURE of this campaign bulletin BEFORE owners take possession of these vehicles.

Dealers are to service all vehicles subject to this campaign at no charge to owners, regardless of mileage, age of vehicle, or ownership, from this time forward.

When a vehicle subject to this campaign is taken into your new or used vehicle inventory, or it is in your dealership for service in the future, you should take the steps necessary to ensure the campaign correction has been made before reselling or releasing the vehicle.

Owners of vehicles recently sold from your new vehicle inventory are to be contacted by the dealer and arrangements made to make the required correction according to instructions contained in this bulletin.

If the name and address of the owner of an involved vehicle was unavailable to GMC Truck Division at the time of campaign initiation, the dealer must determine the owner's name and address from the dealership sales records. Please provide this information directly on the second copy of the listing next to the applicable VIN so that our records may be updated and the appropriate notification mailed to the owner. This second copy should then be submitted to the address listed below in the previously supplied yellow campaign envelopes.

GMC Truck Division General Motors Corporation 101 Union Street Plymouth, Michigan 48170

OWNER NOTIFICATION

Owners will be notified of this campaign on their vehicles by GMC Truck Division (see copy of owner letter included with this bulletin). A listing of owner names and addresses has been furnished to the involved dealers to enable dealers to follow up with owners involved in this campaign. This listing may contain owner names and addresses obtained from State Motor Vehicle Registration records. The use of such motor vehicle registration data for any other purpose is a violation of law in several states. Accordingly, you are urged to limit the use of this listing to this campaign.

SERVICE PROCEDURE

1. Check the front wheels.

2. Remove the eye-bolt to disconnect the front brake flex hose from the brake caliper.

3. Insert a dummy bolt (17mm) into the threaded hole of the caliper to prevent paint particles from entering the caliper.

4. Remove all paint from the caliper eye-bolt mounting surface.

NOTICE: DO NOT USE A METALLIC SCRAPER TO REMOVE PAINT, IT MAY SCRATCH THE SEALING SURFACE.

5. Wipe the surface of the caliper clean after removing the paint.

6. Remove the dummy bolt.

7. Reconnect the flex brake hose to the caliper with the eye-bolt using a new copper gasket on EACH side of the eye-bolt. (See Figure 1). Tighten the eye-bolt 22-30 lbs. ft. (3.0-4.0 kg-m).

8. Bleed the hydraulic brake system FRONT ONLY as described below.

BRAKE BLEEDING PROCEDURE:

1. Fill the brake fluid reservoir with DOT 3 brake fluid and keep at least one-half full of fluid during the bleeding operation.

2. Connect vinyl hose to the bleeder screw.

3. Pump the brake pedal about 4 to 5 times by hand and then hold.

4. Keep pushing the brake pedal until there is slight pressure.

5. Open the bleeder Screw about one-hand turn and fully depress the brake pedal, Observe flow from the bleeder screw.

6. Close the bleeder screw as soon as bubbles stop and the fluid flows in a solid stream. Release the brake pedal after closing the bleeder screw.

7. With the bleeder screw closed, pump the brakes 2 or 3 times and hold with slight pressure, open the bleeder screw, depress the brake pedal all the way to the floor and then close the bleeder screw. Repeat this procedure until there is no air in the brake lines.

8. Dry off any excess fluid around the bleeder screw.

9. Push the brake pedal 2 or 3 times with engine running. Check the fluid leakage from the eye-bolt joint area for leaking fluid.

10. Check the brake fluid reservoir. Add DOT 3 brake fluid as needed.

11. Clean up around the vehicle and remove the wheel chocks.

PARTS INFORMATION

The appropriate number of copper gaskets (2 per caliper/4 per vehicle) are included with this mailing if your dealership has a vehicle(s) involved in this campaign. If additional parts are required they may be obtained directly from American Isuzu Parts Distribution Network (A.I.P.D.N.).

Part Number Description Quantity

94000373 Copper Gasket 4/Vehicle 1052535 Dot 3 Brake Fluid As required

WARRANTY INFORMATION

Dealers should submit an accurately filled out Warranty Repair Order on each vehicle completed under this campaign.

Labor *Time Trouble **Parts Operation Description Allowance Code Allowance Code --------------------------------------------------------------------------- V8980 D&C Front Brake Flex Hose, 0.8 96 $3.40 Remove Paint from Caliper Eye-Bolt Mounting Surface, Replace Two Gaskets Per Caliper and Bleed Front Hydraulic Brake System

* For dealer to receive Administrative Time Allowance associated with this campaign, add 0.1 hour to the Labor Operation Time Allowance.

** The "Parts Allowance" is 40% of all parts required for the repair plus $3.00 for brake fluid. The total dollar amount should be included in the "Net Item" column of the Warranty Claim Form.

CAMPAIGN IDENTIFICATION LABEL

Each vehicle corrected in accordance with the instructions outlined in this product campaign bulletin will require a "Campaign Identification Label." Each Label provides a space to include the campaign number and five (5) digit dealer code of the dealer performing the campaign service. This information may be inserted with a typewriter or ball point pen.

Each "Campaign Identification Label" is to be located on the radiator core support in an area which will be visible when the vehicle is brought in for periodic servicing by the owner.

Apply "Campaign Identification Label" only on a clean dry surface.

ADMINISTRATIVE PROCEDURE

Procedures covering this campaign are outlined in Section V of your dealership's "GMC Truck Warranty Claims Processing Manual" #P9119 Rev. 2/94.

Dear GM Truck Owner:

This notice is sent to you in accordance with the requirements of the National Traffic and Motor Vehicle Safety Act.

General Motors has determined that a defect, which relates to motor vehicle safety, exists in certain 1994 GMC Forward and Chevrolet Tiltmaster W4 Series vehicles equipped with gas engines. A condition exists where the front axle brake caliper may leak brake fluid at the flexible hose connection to the caliper. Brake fluid leakage could reduce brake effectiveness and increase stopping distances which can cause the vehicle to crash without prior warning.

To correct, the dealer will remove paint from the brake caliper, replace copper gaskets and bleed the front brakes. This service will be performed for you at no charge,

Instructions for performing this service have been sent to your GM Medium Duty dealer. Please contact your dealer to arrange a service date. The labor time necessary to perform this correction will be approximately one hour, Please ask your dealer how much additional time will be needed to process your vehicle.

Your GM Medium Duty dealer is best equipped to provide service to ensure your vehicle is corrected as promptly as possible. However, if you take your vehicle to your dealer on the agreed service date and they do not service this condition on that date or within five days, we recommend you contact GMC Truck Consumer Relations by telephone. Consumer Relations will assist you and your dealer in getting your vehicle corrected. The telephone number of the Consumer Relations office is listed in your Warranty and Owner Assistance Information Manual.

After contacting your dealer and GMC Truck Division, if you are still not satisfied that we have done our best to remedy this condition without charge within a reasonable time, you may wish to write the Administrator, National Highway Traffic Safety Administration,, 400 Seventh Street. S.W,, Washington. D.C.. 20590. or call 800-424-9393 (Washington, D.C. residents use 366-0123).

The enclosed postage paid owner reply card identifies your vehicle. Presentation of this card to your dealer will assist in making the necessary correction to your vehicle in the shortest possible time. If you have sold or traded your vehicle, please furnish us complete name and address of the person you sold or traded your vehicle to and return the card to us.

We are sorry to cause you this inconvenience; however, we have taken this action in the interest of your safety and continued satisfaction with our product.

GMC TRUCK DIVISION GENERAL MOTORS CORPORATION

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.