GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

  1. Turn the ignition switch to ON.
  2. Move each window UP and DOWN with the power window switch.

Each window operates quietly and smoothly, without sticking. The left front window travels down all the way without the switch being held (express down feature).

2

Move each window with its individual window switch.

Each window operates quietly and smoothly, without sticking.

Power Window Inoperative

3

Place the passenger lockout switch in the LOCK position. Repeat steps 1 and 2.

The passenger windows are inoperative from their individual switches, but they operate from the power window master switch assembly.

Power Window Lockout Function Inoperative

* Refer to the appropriate symptom diagnostic table for the applicable abnormal result. Always resolve the cause of Diagnostic Trouble Codes (DTCs) prior to troubleshooting other problems.