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. Place the LH heated seat switch in the LOW position.

The LH seat heat comes on after about one minute.

Heated Seat Inoperative

2

Place the LH front heated seat switch in the HIGH position.

The LH seat heat temperature rises after about one minute.

Heated Seat Inoperative

3

Place the LH front heated seat switch in the OFF position.

The LH seat should cool down and remain cool.

Heated Seat Always On

4

Place the RH front heated seat switch in the LOW position.

The RH seat heat comes on after about one minute.

Heated Seat Inoperative

5

Place the RH front heated seat switch in the HIGH position.

The RH seat heat temperature rises after about one minute.

Heated Seat Inoperative

6

Place the RH front heated seat switch in the OFF position.

The RH seat should cool down and remain cool.

Heated Seat Always On

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