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

Press the left front window switch down past the first defeat.

The left front window moves to the fully down position.

Power Window Express Down Function Inoperative

3

Operate each window from its individual switch.

Each window operates quietly and smoothly, without sticking.

4

  1. Press the lock out switch to the LOCK position on the left front power window switch.
  2. Attempt to operate each window from its individual switch.
    • Windows do not operate from their individual switches.
    • Windows only operate from the left front switch.

Power Window Lockout Function Inoperative

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