GM Service Manual Online
For 1990-2009 cars only

Power Seat System Components

The power seat system for the driver and passenger consists of the following components:

    • Power seat switch assembly
    • Horizontal adjuster motor
    • Front vertical adjuster motor
    • Rear vertical adjuster motor
    • Recline adjuster motor
    • SEAT 25A circuit breaker

Power Seat System Operation

There are 2 options of power seats available with this system. One option is the base power seat and it is limited to positioning the seat vertically and horizontal only. The other option is a full feature seat that can position the seat vertically, horizontally and reclining the back cushion. Battery voltage is supplied to the power seat switch from the SEAT 25A circuit breaker. While the seat adjuster switches are in an inactive state the switch contacts are closed to the adjuster switch ground circuit. When a seat adjuster switch is pressed to an active state the switch contact is closed to the battery voltage supply circuit. Each seat adjuster motor is controlled by the seat adjuster switch through 2 motor control circuits. The seat adjuster motors are bidirectional and the direction of adjuster motor rotation is determined by which of the adjuster motor control circuits is switched to battery voltage while the other remains grounded.