CAMPAIGN: REAR BRAKES INCORRECT ASSEMBLIES
MODELS: 1985-86 C15 LIGHT DUTY MODEL TRUCK EQUIPPED WITH 6.2L DIESEL ENGINE (RPO LH6), 4 SPEED MANUAL TRANSMISSION (RPO MM4) AND 3.42 RATIO REAR AXLE (RPO GU6) W/O LOCKING REAR AXLE (RPO G80)
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 neareat GMC Zone 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 Taffic Safety Adminintration.
DEFECT INVOLVED
General Motors has determined that certain 1985 and 1986 GMC C-15 light duty trucks were manufactured with improper size 11 x 2 inch rear brake assemblies, rather than the specified 11.15 x 2.75 inch brakes. These trucks fail to conform to the requirements of Federal Motor Vehicle Safety Standard (FMVSS) 105, "Hydraulic Brake Systems." Under certain conditions, the truck might exceed the maximum stopping distance permitted by FMVSS 105. Should a minimum stopping distance be required while these trucks are being driven, a vehicle crash could occur without prior warning.
To correct this condition, the incorrect rear axle brake assemblies must be replaced with the proper size brake assemblies.
VEHICLES INVOLVED
There are five 1985 and four 1986 GMC Trucks involved. Following are the VIN numbers and the selling dealer codes of the trucks:
1985 SELLING DEALER ---- -------------- 2GTEC14COF1506495 40-204 1GTEC14C2FS513402 47-330 1GTEC14CXFJ518286 44-003 1GTEC14C6FS520109 51-047 1GTEC14C1FF731050 21-212
1986
1GTEC14C3GS519193 47-627 2GTEC14COG1524805 06-053 2GTEC14C4Gl524838 06-053 1GTEC14C5GF718528 44-156
The specific vehicles involved in this campaign have been identified by Vehicle Identification Number Computer listings. These listings are furnished to all involved dealers with the campaign bulletin.
DEALER CAMPAIGN RESPONSIBILITY
This recall campaign is to be performed at no charge to owners on all affected vehicles regardless of time, mileage, or ownership. Dealers are to inspect and correct all affected vehicles in new and used vehicle stock prior to their sale.
Whenever 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 be sure the campaign correction has been made before reselling or releasing the vehicle.
This bulletin is notice to you that the new motor vehicles involved in this campaign may not comply with the standard identified above. Under Section 108 of the National Traffic and Motor Vehicle Safety Act, it is illegal for a dealer to sell a new motor vehicle which the dealer knows does not comply with the applicable Federal Motor Vehicle Safety Standard. As a consequence, if you sell any of these motor vehicles without first performing the campaign correction, your dealership may be subject to a civil penalty up to $1,000 for each such sale.
OWNER NOTIFICATION
Owners will be notified of this campaign on their vehicles by GMC Truck (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
Refer to Figure No. 1 for axle shaft and housing detail.
After performing brake work ensure brake system is operational before returning the vehicle to the owner.
All involved trucks are equipped with an 8.5" ring gear semi-floating rear axle. Refer to Section 4B, Rear Axle, and Section 5, Brakes, of the Light Duty Service Manual X-8632 for further removal or installation instructions.
o Place transmission in neutral.
o Lift and support vehicle.
o Remove tires from rear axle.
o Remove and discard brake drums.
o Disconnect the parking brake cables at the equalizer.
o Remove differential cover and catch the oil in a drain pan.
o Disconnect the brake line at the wheel cylinders and catch the fluid in a drain pan.
o Remove screw (A), pinion shaft (B), and 'C'-lock (G) from the differential case, (Figures No. 2 and No.3.
o Withdraw axle shafts and set aside.
o Remove and discard the complete brake assemblies. This includes the backing plate, attaching hardware and parking brake cable.
o Install new brake assemblies on the axle. Torque backing plate bolts to 47 Nm (35 lb ft).
o Reconnect brake line to the wheel cylinders. Torque to 18 Nm (160 lb in).
o Reinstall axle shafts.
o Reinstall 'C'-lock pinion shaft and screw. Torque screw to 34 Nm (25 lb ft).
o Reinstall differential cover with new gasket. Tighten bolts in a crosswise pattern to assure uniform draw on the gasket. Torque bolts to 27 Nm (20 lb ft). Reclip brake line to the axle.
o Refill differential with SAE-80W or SAE-80W-90 GLS gear lubricant part number 1051855. It will hold approximately 4 pints. Torque filler plug to 34 Nm (25 lb ft).
o Install new brake drums.
o Connect parking brake cables at equalizer and adjust.
o Reinstall tires. Torque wheel stud nuts to 140 Nm (100 lb ft).
o Bleed brake system. Refer to page 5-8 of the Light Duty Service Manual for instructions. Use Delco Supreme II fluid, part number 1052535 or DOT-3 equivalent.
PARTS INFORMATION
Parts will be shipped to each servicing dealer on an as required basis at no charge.
Do not order parts from GMSPO.
Parts will be shipped in two boxes, one right hand and one left hand.
Parts will consist of
1. Brake assembly including backing plate, shoes, wheel cylinder, valve, lever, pin, screw and parking brake cable. 2. Flange attaching bolts, nuts and washers. 3. Drums. 4. Cover pan gasket. 5. Installation instructions.
Procure locally:
QUANTITY DESCRIPTION PART NUMBER -------- ----------- ----------- 4 Pints SAE-80W or 80W- 1051855 90 GLS gear lubricant
AR Brake fluid - Delco 1052535 Supreme II or DOT-3 equivalent
WARRANTY INFORMATION
Dealers should submit a warranty claim for each vehicle completed under this campaign.
Labor Operation **Net *Time Trouble Number Description Item Allowance Code --------- ----------- ----- --------- ------- V3920 Replace brake $100 1.4 hr. 96 assemblies as outlined in service procedures
* Add 0.1 hours for administrative time allowance.
** This amount to be entered as a net item to cover cost of 30 percent markup for brake parts and costs of gear lubricant and brake fluid.
CAMPAIGN IDENTIFICATION LABEL
Each vehicle modified 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 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 Claims Processing Manual" #SD8519.
------------------------------------------------------------------------------ Dear GMC 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 certain 1985 and 1986 GMC C-15 light duty trucks were manufactured with impmper size 11 x 2 inch rear brake assemblies, rather than the specified 11.15 x 2.75 inch brakes. These trucks fail to conform to the requirements of Federal Motor Vehicle Safety Standard (FMVSS) 105, "Hydraulic Brake Systems." Under certain conditions, the trucks might exceed the maximum stopping distance permitted by FMVSS 105. Should a minimum stopping distance be required while these trucks are being driven, a vehicle crash could occur without prior warning.
To correct your vehicle, the rear axle brake assemblies must be replaced with the proper size brake assemblies. This service will be completed for you at no charge.
Instructions for performing this service have been sent to your GMC Truck dealer. Parts are currently available. The labor time to make corrections to your vehicle will be approximately 1 1/2 hours. Please ask your dealer if you wish to know how much additional time will be needed to process your vehicle.
Your GMC Truck dealer is best equipped to obtain parts and provide service to ensure your vehicle is inspected and/or 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 your nearest GMC Truck Zone Office, either in person or by telephone. The Zone Office will assist you and your dealer in getting your vehicle serviced. The locations and telephone numbers of the Zone Offices are listed in your Owner's Manual.
After contacting your dealer and the Zone Office, 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 426- 0123).
The enclosed 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 let us know by completing the postage paid owner reply card and returning it 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 products.
GMC TRUCK GENERAL MOTORS CORPORATION
86C17 Enclosure
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.
