RATTLE NOISE DUE TO LOOSE WHEEL CENTER HUB CAPS

SUBJECT: RATTLE NOISE AS A RESULT OF LOOSE WHEEL CENTRE CAPS (SERVICE PROCEDURE)

VEHICLES AFFECTED: 1991 "J" CARS WITH Z24 TRIM PACKAGE

Condition:

----------- Some 1991 "J" cars with the Z24 trim package may exhibit a rattling noise due to the wheel centre hub cap being loose.

Cause:

------- Loose fit between the wheel and wheel centre cap caused by oversize diameter in wheel.

Correction:

----------- Using channel-lock pliers, with a cloth on cap face to protect the disc from damage, rework the centre cap wire retaining ring (as shown in the picture) in five places to provide a tight fit of the cap to the improperly machined wheels. Bend the wire ring toward the cap disc as shown to obtain a permanent set of approximately one (1) wire diameter.

This condition effects all 1991 Chevrolet J cars with Z24 from 1991 start of Production through VIN breakpoint M7194096.

Use the most applicable Labour Operation and Time from the Canadian Labour Time Guide.

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.