GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

Set the driver seat heater switch to the LO position.

    • The seat temperature rises to approximately 37.5°C (98.5°F).
    • The LO indicator lights.

Heated Seat Inoperative

2

Set the driver seat heater switch to the HI position.

    • The seat temperature rises to approximately 42.5°C (107.5°F).
    • The HI indicator lamp lights.

Heated Seat Inoperative

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