Some 1983-1987 T trucks may experience a squeak from the wheel trim rings. A new trim ring, P/N 15545387, has been released for service to address this condition.
Since the appearance of the new trim ring is different than that of the original, it is recommended that all four trim rings be replaced when a squeak problem is encountered.
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.