CAMPAIGN: HI-TECH TURBO WHEEL FRACTURES IN HUB AREA (N96)

DEFECT INVOLVED GENERAL MOTORS HAS DETERMINED THAT A DEFECT WHICH RELATES TO MOTOR VEHICLES SAFETY EXISTS IN SOME 1984-85 PONTIAC FIREBIRD TRANS AM MODELS. THE WHEELS HAVE BEEN FOUND TO CONTAIN EXCESSIVE POROSITY IN THE HUB AREA WHICH COULD POTENTIALLY AFFECT STRUCTURAL INTEGRITY. THIS COULD ALLOW THE WHEEL TO SEPARATE FROM THE VEHICLE. WHEEL SEPARATION COULD CAUSE A LOSS OF VEHICLE CONTROL WHICH COULD RESULT IN A VEHICLE CRASH WITHOUT PRIOR WARNING. VEHICLES INVOLVED ASSEMBLY BEGINNING UP TO AND MODEL PLANT VIN INCLUDING 1984 TRANS AM W/Y82 "ANNIVERSARY" NORWOOD (N) RPO VAN NUYS (L) S.O.P. E.O.P. 1985 TRANS AM NORWOOD (N) BEING W/N96 RPO VAN NUYS (L) S.O.P. DETERMINED

DEALER ACTION TO ELIMINATE THE POSSIBILITY OF THIS OCCURRING ON VEHICLES INVOLVED, THE FRONT AND REAR WHEELS ARE TO BE REPLACED ACCORDING TO INSTRUCTIONS IN THE PART I - SERVICE PROCEDURE SECTION OF THIS BULLETIN. PART I - SERVICE PROCEDURE 1. RAISE VEHICLE ON HOIST. 2. REMOVE WHEEL NUTS FROM EACH WHEEL. 3. REMOVE EACH WHEEL AND TIRE ASSEMBLY FROM VEHICLE. 4. CAREFULLY REMOVE EACH WHEEL CENTER CAP. 5. REMOVE TIRE FROM EACH WHEEL. 6. INSTALL TIRE ON EACH NEW WHEEL. 7. INSTALL CENTER CAP ON EACH NEW WHEEL. 8. BALANCE EACH NEW TIRE AND WHEEL ASSEMBLY. 9. INSTALL NEW FRONT TIRE/WHEEL ASSEMBLIES AND NEW REAR TIRE/WHEEL ASSEMBLIES ONTO VEHICLE. 10. USING CARE TO PREVENT NUT DAMAGE, RETORQUE EACH WHEEL LUG NUT TO 80-110 NM (59-81 FT. LBS.). 11. LOWER HOIST. 12. SEE PART II FOR INSTALLATION OF CAMPAIGN IDENTIFICATION LABEL.

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.