REAR SUSPENSION SPRING CLUNK INSTALL LWR. SPRING INSULATOR

SUBJECT: REAR SUSPENSION SPRING CLUNK (INSTALL SPRING LOWER INSULATORS)

VEHICLES AFFECTED: 1991 "B" CAR STATION WAGONS

Condition:

---------- Some 1991 B-car station wagons assembled prior to VIN breakpoints indicated below may exhibit a clunking type noise from the rear of the vehicle when being operated over irregular road surfaces.

VIN Breakpoints

Chevrolet MW261909 Oldsmobile MW307376 Buick MW406956

Cause:

------ Rear coil spring movement on rear axle assembly spring seats.

Correction:

----------- Install rear spring lower insulators, P/N 10004110 (2 required/vehicle) at the spring to axle assembly spring seat interface following applicable Service Manual procedures.

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