GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Heated Seats Schematics

DEFINITION: The driver or passenger seat heaters are on when the heated seat switches are turned off.

1

Did you review the Heated Seat System Description and Operation and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Seats

2

  1. Disconnect the heated seat cushion 4-way connector.
  2. Connect a test lamp from the heated seat switch signal circuit terminal to ground.
  3. Turn the ignition ON.
  4. Turn the heated seat switch OFF.

Does the test lamp illuminate?

Go to Step 3

Go to Step 5

3

Test the heated seat switch signal circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 6

Go to Step 4

4

Replace the heated seat switch. Refer to Multifunction Switch Assembly Replacement - Instrument Panel .

Is the repair complete?

Go to Step 6

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5

Replace the seat cushion heater element. Refer to Driver Seat and Passenger Seat Cushion Heater Replacement .

Is the repair complete?

Go to Step 6

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6

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2