Some 1982-1983 Grand Prix and Bonneville models equipped with air conditioning may experience a moan condition at 50-55 mph or approximately 1300 engine rpm.
The brace and bracket used in production for the 1984 model will correct this condition.
Parts are as follows:
25518931 Brace, A/C Compressor Adj. RR & Generator Adj. RR
25518933 Bracket
14060613 Bolt, Brace to A/C Compressor Support
11507036 Nut, Brace to Manifold Stud
25518172 Stud (For use on 4.1L Engine)
See illustration (shown on the reverse side) for installation instructions.
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.