2008 Chevrolet Uplander Owner's Manual - Page 126
2008 Chevrolet Uplander Manual
Page 126 highlights
If the engine still does not start, and the key appears to be undamaged, try another ignition key. If the engine still does not start with the other key, your vehicle needs service. If your vehicle does start, the first key may be faulty. See your dealer/retailer or a locksmith who can service the PASS-Key® III to have a new key made. It is possible for the PASS-Key® III decoder to learn the transponder value of a new or replacement key. Up to 10 keys may be programmed for the vehicle. This procedure is for learning additional keys only. If all the currently programmed keys are lost or do not operate, you must see your dealer/retailer or a locksmith who can service PASS-Key® III to have keys made and programmed to the system. See your dealer/retailer or a locksmith who can service PASS-Key® III to get a new key blank that is cut exactly as the ignition key that operates the system. To program the new key: 1. Verify the new key has PK3 stamped on it. 2. Insert the original, already programmed key into the ignition lock cylinder and start the engine. If the engine will not start, see your dealer/retailer for service. 3. After the engine has started, turn the key to LOCK/OFF and remove the key. For vehicles first sold in Canada, repeat step 2 with a different, already programmed, key before proceeding to step 4. 4. Insert the key to be programmed and turn it to ON/RUN within 10 seconds of removing the previous key. The security message will turn off once the key has been programmed. It may not be apparent that the security message went on due to how quickly the key is programmed. 5. Repeat Steps 1 through 4 if additional keys are to be programmed. If you are ever driving and the security message comes on and stays on, you will be able to restart your engine if you turn it off. Your PASS-Key® III system, however, is not working properly and must be serviced by your dealer/retailer. Your vehicle is not protected by the PASS-Key® III system at this time. If you lose or damage a PASS-Key® III key, see your dealer/retailer or a locksmith who can service PASS-Key® III to have a new key made. Do not leave the key or device that disarms or deactivates the theft deterrent system in the vehicle. 2-30