Grand Prix V6-191 3.1L (1989)
Fuel Tank Mounting Straps: All Technical Service Bulletins
Fuel Tank/Underbody - Creak/Groan Noise
Bulletin Number:
91-6-28A
Reference Number:
136304
Publish Date:
10/91
Subject:
FUEL TANK/UNDERBODY NOISE (SERVICE PROCEDURE FOR INSTALLING FUEL TANK STRAPS AND SPACERS)
Models
Affected:
1989-91 GRAND PRIX MODELS
This bulletin cancels and supersedes Service Bulletin 91-6-28 issued 3/91. Also additional information and part numbers are provided to address another
fuel tank related noise condition.
Condition:
Some 1989-91 Grand Prix models may exhibit a creak/groan or in severe instances a clunk/thud type noise coming from the rear of
the vehicle. This noise is most apparent when a vehicle twisting motion is generated, such as that which would be experienced when
turning up a steep incline/driveway.
Cause:
These noise conditions may be caused by the fuel tank flange contacting the underbody crossbar located forward of the fuel tank or
movement between the tank and retaining straps.
Correction:
On 1989-91 vehicles assembled prior to VIN breakpoints indicated below, install new fuel tank straps, P/N 10199250 (2 required),
and strap spacers, P/N 10192675 (2 required).
On 1991 vehicles assembled after VIN breakpoints it will only require installation of tank straps, P/N 10199250 (2 required) and the
transfer of existing strap spacers.
The VIN breakpoint is MF235111.
Service Procedure:
1.
Raise vehicle on hoist.
2.
Remove exhaust intermediate pipe heat shield.
3.
Support fuel tank assembly.
