GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

Press the button on the Garage Door Opener.

LED illuminates

Garage Door Opener Inoperative

2

Press the button on the Garage Door Opener within range of the customer's receiver

Receiver functions properly

Garage Door Opener Does Not Transmit

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