POWER SEAT ADJUSTER DIAGNOSIS SERVICE MANUAL REVISION. Buick Skyhawk 1983

MODELS AFFECTED: 1983 Skyhawk

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

POWER SIX-WAY SEAT ADJUSTER MECHANICAL DIAGNOSIS CHART

If it is apparent or suspected that the trouble is in the electrical system, refer to Electrical Diagnosis (Section 8A).

CONDITION APPARENT CAUSE CORRECTION

1. Horizontal operation of 1. Improper lubrication 1. Lubricate seat not smooth (jerky) adjuster shoes/channels. adjuster upper apparent hard operation channel & plastic shoe. 2. Adjuster horizontal 2. See Horizontal actuator gear too tight Actuator Adjust- to rack gear. ment 3. Adjuster shoes too 3. Install new tight in upper shoes on adjuster channel. lower channel. 2. One adjuster will not 1. Horizontal drive cable 1. Check horizontal operate horizontally. disconnected or damaged. drive cables, 2. Horizontal actuator replace if damaged. inoperative. 2. Replace horizontal actuator assembly.

3. One adjuster will not 1. Vertical drive cable 1. Check vertical operate vertically. disconnected or damaged. drive cables, 2. Vertical gear nut replace if damaged. inoperative. 2. Replace vertical actuator assembly.

4. Both adjusters will not 1. Inoperative horizontal 1. See Electrical operate horizontally and/or vertical solenoid Diagnosis (Section and/or vertically. in transmission. 8A). 2. Damaged, broken or 2. Replace damaged, inoperable solenoid broken or inoper- plunger shaft, dog, able solenoid part dog spring gear or with new part. 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.