GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

DEFINITION: Both driver and passenger heated seats are inoperative.

1

Did you review the system operation and perform the necessary inspections?

--

Go to Step 2

Go to Symptoms - Seats

2

Verify the fault is present.

Does the system operate normally?

--

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

Test the battery positive voltage to the heated seat modules for a short to ground or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 5

Go to Step 4

4

Test the battery positive voltage to the heated seat switches for a short to ground or an open. If you repair a short to ground, replace the HVAC/DIC/DRL HEATED SEAT fuse. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 5

5

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 3