RACK AND PINION POWER STEERING GEAR

Model and Year: 1988 CAVALIER WITH POWER STEERING

Beginning with the following VIN breakpoints, 1988 Cavalier model vehicles equipped with power steering are utilizing a new type of center take-off power rack and pinion steering gear assembly.

The new gear assembly utilizes a cast iron 'top hat' in the upper portion of the valve housing assembly. It can be easily identified by visual observation of the housing assembly, or by checking for correct bi-letter codes stamped on the tie rod lock plate (refer to Figure).

Breakpoint Information

Janesville Assembly Plant (VIN Code J)

BI-LETTER RATIO CODE VIN ----- ---- ---

16:1 CP JJ184475 14:1 MU 14:1 MW JJ184451

Lordstown Assembly Plant (VIN Code 7)

16:1 CP J7158411 14:1 MW J7158403

Service Part Number Information

When replacing a steering gear assembly, be sure to properly identify the type of rack assembly (Cast Iron Top Hat valve housing or Aluminum valve housing) in the vehicle. The GMSPO Parts catalog will indicate the correct part number(s) to order based on the model, model year, and type of valve housing (Cast Iron or Aluminum) the vehicle steering gear is equipped with.

The usage of Cast Iron Top Hat steering gear assemblies in Celebrity vehicles will be provided as information becomes available.

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.