During the 1984 model year production run, an alternate pinion depth shim location was established as shown in Figure 1. The service procedures remain the same as outlined in Section 4B, Page 4B-16.
For the 1985 model year, the subject shim will be located in Position B only as shown in Figure 1.
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.