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 RUN position.
  2. Press the seat heat switch at the LH front door.

The LH heated seat HIGH LED comes on. The LH front seat heat comes on HIGH in about a minute.

Heated Seat Inoperative

2

Press the seat heat switch at the LH front door.

The LH heated seat LOW LED comes on. The LH front seat heat temperature lowers to LOW in about a minute.

Heated Seat Inoperative

3

Press the seat heat switch at the LH front door.

The LH heated seat LOW LED goes out. The LH front seat cools down and remains cool.

Heated Seat Always On

4

Press the seat heat switch at the RH front door.

The RH heated seat HIGH LED comes on. The RH front seat heat comes on HIGH in about a minute.

Heated Seat Inoperative

5

Press the seat heat switch at the RH front door.

The RH heated seat LOW LED comes on. The RH front seat heat temperature lowers to LOW in about a minute.

Heated Seat Inoperative

6

Press the seat heat switch at the RH front door.

The RH heated seat LOW LED goes out. The RH front seat cools down and remains cool.

Heated Seat Always On

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