GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Driver Seat Schematics or Passenger Seat Schematics

Connector End View Reference: Power Seat Connector End Views

DEFINITION: The driver or passenger seat stays warm.

1

Did you review the heated seat operation and perform the necessary inspection?

Go to Step 2

Go to Symptoms - Seats

2

Verify that the Heated Seat Always On complaint is present. Does the heated seat system operate as described in the system description and operation?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, observe the appropriate Heated Seat Switch parameter in the HVAC Control Module data list.

Does the Heated Seat Switch parameter display Pressed?

Go to Step 6

Go to Step 4

4

Test the heated seat element supply voltage circuit between the climate control seat module and the seat heating elements for a short to voltage. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 9

Go to Step 5

5

Inspect for poor connections at the harness connector of the climate control seat module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 9

Go to Step 7

6

Inspect for poor connections at the harness connector of the HVAC control module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 9

Go to Step 8

7

Replace the climate control seat module. Refer to Control Module References for replacement, setup, and programming.

Did you complete replacement?

Go to Step 9

--

8

Replace the HVAC control module. Refer to Control Module References for replacement, setup, and programming.

Have you finished the replacement?

Go to Step 9

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9

Operate the system to verify the repair.

Did you correct the condition?

System OK

Go to Step 2