1999 Chevrolet Astro Owner's Manual - Page 123

yellowblue Your vehicle's engine should be turned off while programming the transmitter. Follow these steps to program up to three channels: 1. If you have previously programmed a transmitter channel, proceed to Step 2. Otherwise, hold down the two outside buttons on the universal transmitter until the indicator light begins to flash rapidly (after 20 seconds). Then release the buttons. This procedure initializes the memory and erases any previous settings for all three channels. 2. Decide which one of the three channels you want to program. Hold the end of the hand-held transmitter about 2 to 5 inches (5 to 13 cm) away from the surface of the universal transmitter so that you can still see the indicator light. 3. Using both hands, press the hand-held transmitter button and the desired button on the universal transmitter. Continue to press both buttons through Step 4. 4. Hold down both buttons until you see the red light on the universal transmitter flash rapidly. The rapid flashing indicates that the universal transmitter has been programmed. Release both buttons once the light starts to flash rapidly. If you have trouble programming the universal transmitter, make sure that you have followed the directions exactly as described and that the battery in the hand-held transmitter is not dead. If you still cannot program it, rotate the hand-held transmitter end over end and try again. The universal transmitter may not work with older garage door openers that do not meet current Federal Consumer Safety Standards. If you cannot program the transmitter after repeated attempts, refer to "Training a Garage Door Opener with Rolling Codes" later in this section or contact the manufacturer of the unit at 1-800-355-3515. Be sure to keep the original hand-held transmitter in case you need to erase and reprogram the universal transmitter. Note to Canadian Owners: During programming, the hand-held transmitter may automatically stop transmitting after one or two seconds. In this case, you should press and re-press the button on the hand-held transmitter every two seconds without ever releasing the button on the universal transmitter. Release both buttons when the indicator light on the universal transmitter begins to flash rapidly. 2-53