1985 Devilles and Fleetwoods Equipped with aluminum wheels (Option PD8) may not properly retain the centre hubcaps. If this condition is encountered, inspect the wheel to insure that a hubcap retention groove is present on the inside flat area of the wheel flange (See Figure 1). If the hubcap retention groove is not present, the wheel must be replaced (P/N 3634581). Do not attempt to machine or modify an incorrect wheel.
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.