GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Power Window Schematics

Connector End View Reference: Power Door Systems Connector End Views

1

Did you perform the Vehicle Diagnostic System Check?

Go to Step 2

Go to in Vehicle DTC Information

2

Verify that the driver power window express down function is inoperative.

Does the driver power window express down function operate normally?

Go to in Wiring Systems

Go to Step 3

3

Inspect for a poor connections at the harness connector of the driver window switch. Refer to and in Wiring Systems.

Did you find and correct the condition?

Go to Step 5

Go to Step 4

4

Replace the driver window switch. Refer to Front Side Door Window Switch Replacement - Left Side .

Is the repair complete?

Go to Step 5

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5

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2