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 left front door.
    • The left heated seat HIGH LED turns on.
    • The left front seat heat turns on HIGH in about 1 minute.

Heated Seat Inoperative

2

Press the seat heat switch at the left front door.

    • The left heated seat LOW LED turns on.
    • The left front seat heat temperature lowers to LOW in about 1 minute.

Heated Seat Inoperative

3

Press the seat heat switch at the left front door.

    • The left heated seat LOW LED turns off.
    • The left front seat cools down and remains cool.

Heated Seat Always On

4

Press the seat heat switch at the right front door.

    • The right heated seat HIGH LED turns on.
    • The right front seat heat turns on HIGH in about 1 minute.

Heated Seat Inoperative

5

Press the seat heat switch at the right front door.

    • The right heated seat LOW LED turns on.
    • The right front seat heat temperature lowers to LOW in about 1 minute.

Heated Seat Inoperative

6

Press the seat heat switch at the right front door.

    • The right heated seat LOW LED turns off.
    • The right front seat cools down and remains cool.

Heated Seat Always On

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