POWER SEAT ADJUSTER DIAGNOSIS SERVICE MANUAL REVISION

The following information was omitted from the 1983 2000 Service Manual:

POWER SIX-WAY SEAT ADJUSTER MECHANICAL DIAGNOSIS CHART

CONDITION APPARENT CAUSE CORRECTION

1. Horizontal 1. Improper lubrication 1. Lubricate adjuster operation of adjuster shoes/channels. upper channel and seat not smooth plastic shoes. (jerky)-apparent 2. Adjuster horizontal 2. See Horizontal hard operation. actuator gear too tight Actuator Adjustment. to rack gear. 3. Adjuster shoes too tight 3. Install new shoes on in upper channel. adjuster lower channel. 2. One adjuster will 1. Horizontal drive cable 1. Check horizontal drive not operate disconnected or damaged. cables, replace if horizontally. 2. Horizontal actuator damaged. inoperative. 2. Replace horizontal actuatorassembly. 3. One adjuster will 1. Vertical drive cable 1. Check vertical drive not operate disconnected or damaged. cables, replace if vertically. 2. Vertical gearnut damaged. inoperative. 2. Replace vertical actuator assembly. 4. Both adjusters 1. Inoperative horizontal 1. See Electrical Diagnosis will not and/or vertical solenoid (Section 8A). operate in transmission. 2. Replace damaged, broken horizontally 2. Damaged, broken or or inoperable solenoid and/or vertically inoperable solenoid part with new part. plunger shaft, dog, dog spring gear or drive gear.

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.