CCC MIXTURE CONTROL SOLENOID NOISE INFORMATION

IF AN ENGINE NOISE CONDITION SIMILAR TO A NOISY LIFTER IS ENCOUNTERED THE CAUSE MAY BE THE MIXTURE CONTROL SOLENOID. IT CAN BE VERIFIED AS THE SOLENOID BY LOOSENING THE AIR CLEANER WING NUT. TO HELP DAMPEN THE NOISE, IT IS RECOMMENDED THAT TWO AIR HORN GASKETS BE USED AND THAT RUBBER OR FELT BE USED UNDER A FLAT WASHER AND THE WING NUT. TIGHTEN THE WING NUT JUST ENOUGH TO COMPRESS THE AIR CLEANER SUFFICIENTLY TO RETAIN IT IN PLACE.

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.