POWER SEAT ADJUSTER EXCESSIVE MOVEMENT

VEHICLES AFFECTED: 1984 TO 1987 CORVETTES

Due to a component change within the power seat transmissions for 1984 to 1987 Corvettes, two (2) transmission assemblies and carriages are now available for service.

In order to determine which transmission will be needed for servicing,it will be necessary to identify the assemblies by date code numbers.

Vehicles built with seat assemblies which have date codes prior to 233-86 will use P/N 10065222 transmission assembly. Vehicles built using date codes after 233-86 will use P/N 10081946. The date code locations are: the left front floor mounting support and; the inboard front upper corner of the seat transmission assembly. (See Illustration)

The differences in the seat transmissions involve the pinion gear shaft sizes which engage the bushings on the right sides which engage the bushings on the right side carriage. The early pinion gear shafts (prior to 233-86) are 6.3mm (1/4") in diameter. The later pinion gear shafts (after 233-86) are 7.9mm (5/16") in diameter. The carriages for each transmission are also specific. The carriage Part Number prior to 233-86 is 14067602, and after 233-86 the Part Number is 10081947.

Please refer to the information within this bulletin for proper parts usage if service is required on the seat adjuster assembly.

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.