GM Service Manual Online
For 1990-2009 cars only

NOISE DURING RIGHT HAND TURNS- MIS-ADJUSTED ENGINE MOUNT

A LOUD CRUNCHING NOISE DURING SHARP RIGHT TURNS WHEN CHANGING ENGINE LOAD FROM ACCELERATION TO DECELERATION OR VICE VERSA MAY BE CAUSED BY A METAL TO METAL CONTACT OF THE RIGHT REAR ENGINE MOUNT. ADJUST MOUNT FOR CLEARANCE TO CORRECT CONDITION.

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.