Contents Wiring diagrams Section: Seats All sections

Seats - Power: Overview GMC C3500 HD

Seats ~125 words

DESCRIPTION & OPERATION

A 6-way power seat is used on driver's seat (all models) and passenger seat (some models). System consists of 3 reversible motors attached to a seat drive rail. Each motor contains a self-resetting circuit breaker. Power seat switch is located on left side of driver's seat, or on right side of passenger's seat. Drive cables connect motor to gearnuts, which turn jack screws and adjusters at each side of seat.

HORIZONTAL OPERATION OF SEAT NOT SMOOTH, APPARENT HARD

OPERATION

  1. Check improper lubrication of adjuster shoes and channels. Lubricate carriages and seat adjuster slides with lithium base grease.
  2. Check adjuster horizontal actuator gear for being over tightened to rack gear. Tighten mounting screws or replace transmission assembly, if necessary.