2001 Chevrolet Impala Owner's Manual - Page 142

If you programmed the HomeLinkR Transmitter, but the garage door will not open, and if your garage door opener was manufactured after 1995, your garage door may have a security feature that changes the "code" of your garage door opener every time it is opened or closed. To determine if your garage door opener has this "rolling code" feature, press the appropriate button on the HomeLink Transmitter that was programmed. If the indicator light flashes rapidly for one or two seconds, then turns solid, your garage door opener has this feature. To program a garage door opener with the rolling code feature, do the following: 1. Program your hand-held transmitter to the HomeLink Transmitter by following the steps provided under "Programming the Transmitter" earlier in this section. Because of the steps involved, it may be helpful to have another person available to assist you in programming the transmitter. Training a Garage Opener with a "Rolling Code" Feature 2. Remove the cover panel from the garage door opener receiver. It is located near the garage door opener motor. 3. Locate the training button on the garage door opener receiver. The exact location and color will vary among brands. 4. Press the training button on the garage door opener receiver. This will activate the training light. 5. Within thirty seconds of pressing the training button, return to your vehicle and press the programmed button on the HomeLink Transmitter until the indicator light flashes rapidly (about two seconds). 6. Release the button, then press it again to confirm it was programmed to the garage door opener receiver. It may take more than one attempt to confirm that the transmitter was programmed. You may now use either the HomeLink Transmitter or the hand-held transmitter to open your garage door. If you still have difficulty in programming and require assistance, please call 1-800-355-3515. 2-72