CAMPAIGN: WHEEL LUG NUT TORQUE REPAIR PROCEDURE
MODELS AFFECTED 1988 PONTIAC GRAND PRIX
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 sixty 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 reasonable 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, everv effort must be made to promptly schedule an appointment with each, owner and to repair their vehicle as soon as possible. As you will see in reading the attached copy of the letter which is being sent to owners, the owners are being instructed to contact the Pontiac Customer Assistance Center if their 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, owners are instructed on how to contact the National Highway Traffic Safety Administration.
DEFECT INVOLVED
General Motors has determined that a defect which relates to motor vehicle safety may exist in certain 1988 Pontiac Grand Prix model vehicles. The vehicles could have been assembled with wheel lug nuts not installed to specified torque. This condition could allow the lug nuts to loosen and/or come off the wheel studs. If this condition went unnoticed, it could eventually result in the wheel separating from the vehicle. Separation of a wheel from the vehicle could cause loss of vehicle control and a vehicle crash could occur.
DEALER ACTION
To prevent the possibility of this condition occurring, dealers are to inspect all involved vehicles to assure proper wheel nut torque. If lug nuts are loose or missing, they are to be replaced along with the wheel studs, according to the instructions included in this bulletin.
VEHICLES INVOLVED
Involved are certain 1988 Pontiac Grand Prix model vehicles produced within the following VIN breakpoints:
Year Plant Beginning Up to and Including ---- ----- --------- ------------------- 1988 Fairfax JF200067 JF208436
Involved vehicles have been identified by Vehicle Identification Number computer listings. Computer listings contain the complete Vehicle Identification Number, owner name and address data, and are furnished to the involved dealers with the campaign bulletin. Owner name and address data furnished will enable dealers to follow up with owners involved in this campaign.
These listings 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 the follow up necessary to complete this campaign. Any dealer not receiving a computer listing with the campaign bulletin has no involved vehicles currently assigned.
OWNER NOTIFICATION
Owners will be notified of this campaign on their vehicles by Pontiac Division (see copy of Owner Letter included with this bulletin).
DEALER CAMPAIGN RESPONSIBILITY
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.
Whenever a vehicle subject to this campaign is taken into your new or used vehicle inventory, or it is in your dealershiD 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.
Owners of vehicles recently sold from your new vehicle inventory are to be contacted by the dealer, and arrangements made to make the required modification according to instructions contained in this bulletin.
PARTS INFORMATION
Parts required to complete this campaign are to be obtained from General Motors Service Parts Operation (GMSPO). To ensure that these parts are obtained as soon as possible they should be ordered on a C.I.O. order with no special instruction code, but on advise code (2).
Description Part Number Quantity Per Vehicle ----------- ----------- -------------------- Bolt Wheel stud 12 x 1.5 9590474 As Required x 36 (Front Only)
Bolt Wheel stud 12 x 1.5 9590476 As Required x 43 (Rear Only)
Nut (For Aluminum Wheel) 10028615 As Required
Nut (For Styled Steel 10052084 As Required Wheel)
Nut (For Base Steel 9590477 As required Wheel)
Nut Cap (For Aluminum 14102446 As Required or Styled Steel Wheel)
Note: Nut caps not used on base steel wheels.
SERVICE PROCEDURE
- Visually inspect all studs and nuts for damage. Wheels with no broken studs or missing nuts should be re-torqued to 100 lb. ft. (136 Nm.).
- Wheels with one (1) broken/damaged stud or missing nut should have the stud or nut replacecd. The stud and nut on either side of the broken/damaged stud or missing nut should also be replaced.
- (Refer to Front Wheel Bolt Replacement or Rear Wheel Bolt Replacement Section in this bulletin as required).
- If more than one (1) stud is broken/damaged or wheel lug nuts are missing, all studs and nuts on the involved wheel are to be replaced. All nuts should be torqued to 100 lb. ft. (136 Nm).
- Wheels should be inspected for damage and replaced if necessary.
FRONT WHEEL BOLT REPLACEMENT
NOTE: A 36 mm. wheel bolt should be used for front replacement service only. Rear service replacement will be the current 43 mm. production bolt.
1. Raise vehicle.
2. Remove or disconnect wheel and tire assembly.
3. Remove brake caliper and bracket assembly, hang from vehicle. Do not allow to hang by brake hose.
4. Remove brake rotor.
5. Wheel bolt must be 10 - 12 mm shorter than original (43mm) length for removal. Cut bolt as necessary and rotate to six o'clock position.
6. Using tool J 6627-A or equivalent, extract bolt from hub (see illustration).
7. Clean wheel hub flange and rotor of any corrosion, metal chips or foreign material.
Installation
1. Install shorter (P/N 9590474 - 36mm) replacement bolt in wheel hub.
2. Add enough washers (see illustration) to draw bolt into hub.
3. Install wheel nut (flat side to washers).
4. Tighten wheel nut until wheel bolt is fully seated against hub flange.
MAKE SURE WHEEL BOLT IS FULLY SEATED AGAINST HUB FLANGE.
5. Back off wheel nut and remove washers.
6. Install brake rotor.
7. Install brake caliper and bracket assembly, torque bolts to 200 Nm. (148 lb. ft.)
8. Install wheel and tire assembly.
9. Lower vehicle.
10. Tighten wheel nuts to 140 Nm. (100 lb. ft.).
REAR WHEEL BOLT REPLACEMENT
1. Raise vehicle.
2. Remove or disconnect wheel and tire assembly.
3. Remove brake hose bracket.
4. Remove brake caliper, hang from vehicle. Do not allow to hang by brake hose. Tool J 36581 allows easier access for removal as well as installation of caliper bolts.
5. Remove brake rotor.
6. Using tool J 6627-A or equivalent, extract bolt from hub (see illustration).
7. Clean wheel hub flange and rotor of any corrosion, metal chips or foreign material.
Installation
1. Install replacement bolt (P/N 9590476-43mm) in wheel hub.
2. Add enough washers (see illustration) to draw bolt into hub.
3. Install wheel nut (flat side to washers).
4. Tighten wheel nut until wheel bolt is fully seated against hub flange.
MAKE SURE WHEEL BOLT IS FULLY SEATED AGAINST HUB FLANGE.
5. Back off wheel nut and remove washers.
6. Install brake rotor.
7. Install brake caliper and bracket assembly, torque bolts to 123 Nm.(91 lb. ft.).
8. Install brake hose bracket and torque bolt to 25 Nm.(18 lb. ft.).
9. Install wheel and tire assembly.
10. Lower vehicle.
11. Tighten wheel nuts to 140 Nm. (100 lb. ft. ).
12. Install Campaign Identification Label.
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 campaign number, the five digit dealer code of the dealer performing the campaign service, and the date the vehicle was campaigned. This information may be inserted with a typewriter or ball point pen. Install the label only on a clean, dry surface of the radiator baffle where it is readily visible. (Additional campaign labels are available on stationery order as Form 7901-709).
CLAIM INFORMATION
A separate repair order must be kept for each vehicle. A completed warranty claim is to be kept as a permanent record of completion.
DEALERS SHOULD SUBMIT WARRANTY CLAIMS FOR CREDIT IN THEIR NORMAL MANNER WHEN THEY PERFORM THE SERVICE AS FOLLOWS: Other * Failure Labor Labor Labor Operation Code Operation Hours Hours --------- ------- --------- ----- ------ Re-torque Lug Nuts Only 96 V4540 0.3 0.1
Additional Times:
With Locking Wheel Bolts................O.2 To Replace 3 Front Studs................O.8 To Replace 5 Front Studs................l.l To Replace 6 Front Studs................I.6 To Replace 8 Front Studs................1.8 To Replace All Front Studs..............2.1
To Replace 3 Rear Studs.................O.7 To Replace 5 Rear Studs.................O.9 To Replace 6 Rear Studs.................1.3 To Replace 8 Rear Studs................ 1.5 To Replace All Rear Studs...............1.7
* In addition, dealership will receive 0.1 hours credit for dealer administrative services associated with this campaign. The 0.1 hours allowance is to be entered in the the "Other Labor Hours" field with each campaign repair listed for credit. This entry will not require authorization.
FAILURE CODE 96 MUST BE USED WITH THIS LABOR OPERATION.
Parts required are to be listed in your warranty claim in the normal manner. Parts will be credited at dealer net plus 30% dealer handling allowance.
Dealers will be credited via Warranty Document or Terminal Transmission, whichever is their normal method of submission for payment. Claim must contain all information required and should list the labor operation as outlined.
RECORDING COMPLETION
Repairs submitted for vehicles not involved in the campaign will not be paid.
Campaign completion will be recorded from "PROPERLY COMPLETED AND PAID WARRANTY CLAIMS." Owners are being asked to present the owner reply card for identification to their dealer at the time they bring in their vehicle to have the campaign performed.
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.
