GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC K Pickup - 4WD 🢒 Body and Accessories 🢒 Seats 🢒 Heated Seats System Check

Step

Action

Normal Result(s)

Abnormal Result(s)*

1
  1. Turn the ignition switch to the ON position.
  2. Place the LF heated seat switch to the HIGH position.
  3. Place the LF heated seat switch to the LOW position.
    • LF heated seat heats on HIGH.
    • LF heated seat heats on LOW.

Heated Seat Inoperative

2
  1. Turn the ignition switch to the ON position.
  2. Connect the RF seat belt buckle.
  3. Place the RF heated seat switch to the HIGH position.
  4. Place the RF heated seat switch to the LOW position.
    • RF heated seat heats on HIGH.
    • RF heated seat heats on LOW.

Heated Seat Inoperative

3
  1. Turn the ignition switch to the ON position.
  2. Connect the LR and RR seat belt buckles.
  3. Place the LR and RR heated seat switches to the HIGH position.
  4. Place the LR and RR heated seat switches in the LOW position.
    • LR and RR heated seats heat on HIGH.
    • LR and RR heated seats heat on LOW.

Heated Seat Inoperative - Rear

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