EXHAUST BOOM/FLOOR PAN VIBRATION-EXHAUST HANGER

SOME "J" SERIES VEHICLES MAY EXHIBIT AN 1800 RPM EXHAUST BOOM/ FLOORPAN VIBRATION. TO REPAIR THIS CONDITION, THE CENTER EXHAUST HANGER ASSEMBLY (P/N 25513349), SHOULD BE REPLACED WITH A NEW HANGER (P/N 25521686). THE EXISTING BOLTS SHOULD BE REPLACED WITH TWO NEW BOLTS (P/N 25509534) AND TWO WASHERS P/N 11500323).

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.