GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

  1. Turn the ignition switch to the ON position.
  2. Press the driver seat heater switch.

The driver seat warms up to a comfortable level.

The driver seat does not warm up. Refer to Heated Seat Inoperative for diagnosis.

2

Press the passenger seat heater switch.

The passenger seat warms up to a comfortable level.

The passenger seat does not warm up. Refer to Heated Seat Inoperative for diagnosis.

3

Press the LH rear seat heater switch.

The LH rear seat warms up to a comfortable level.

The LH rear seat does not warm up. Refer to Heated Seat Inoperative - Rear for diagnosis.

4

Press the RH rear seat heater switch.

The RH rear seat warms up to a comfortable level.

The RH rear seat does not warm up. Refer to Heated Seat Inoperative - Rear for diagnosis.

* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.