GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

Operate each window up and down from the left front window switch.

Each window operates quietly and smoothly, without sticking.

2

Operate each window from its individual switch.

Each window operates quietly and smoothly, without sticking.

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