For 1990-2009 cars

Step | Action | Normal Result(s) | Abnormal Result(s)*
--- | --- | --- | ---
1 | Operate each window up and down from the LH front power window switch. | Each window operates quietly and smoothly, with no sticking. The left front window rolls down all the way without the switch being held (express down feature). |

• | Power Window Inoperative - Left Side

• | Power Windows Inoperative from Left Front Switch

• | Power Window Express Down Function Inoperative

2 | Operate each window from the window's individual window switch. | Each window operates quietly and smoothly, with no sticking. | Power Window Inoperative from Left Rear, Right Front, or Right Rear Switches
3 | Place the window lockout switch in the LOCK position. Repeat steps 1 and 2. (Applies to Buick and Oldsmobile only). | The rear windows do not operate from their individual switches, but they operate from the LH front power window switch. | Power Window Lockout Function Inoperative
* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.