2009 Hummer H3T Alpha Owner's Manual - Page 80

2-14 Features and Controls When trying to start the vehicle, if the engine does not start and the security light comes on, there may be a problem with the theft-deterrent system. Turn the ignition off and try again. If the engine still does not start, and the key appears to be undamaged, try another ignition key. Check the fuse. See Fuses and Circuit Breakers on page 5-91. If the engine still does not start with the other key, the vehicle needs service. If the vehicle does start, the first key may be faulty. See your dealer/retailer who can service the theft-deterrent system and have a new key made. It is possible for the theft-deterrent system decoder to learn the transponder value of a new or replacement key. Up to 10 keys can be programmed for the vehicle. The following procedure is for programming additional keys only. Canadian Owners: If the keys are lost or damaged, only a dealer/retailer can service the theft-deterrent system to have new ones made. Two current driver's keys are required to program additional keys. To program a new key: 1. Verify that the new key has PK3+ stamped on it. 2. Insert the current driver's key in the ignition and start the engine. If the engine does not start see your dealer/retailer for service. 3. After the engine has started, turn the key to LOCK/OFF, and remove the key. 4. Insert the second current driver's key in the ignition and start the engine within ten seconds of removing the previous key. If the engine does not start see your dealer/retailer for service. PASS-Key® III+ Electronic Immobilizer Operation (Canada Only) This vehicle has a passive theft-deterrent system. The system is automatically armed when the key is removed from the ignition. The system is automatically disarmed when the key is turned to ON/RUN. You do not have to manually arm or disarm the system. The security light comes on if there is a problem with arming or disarming the theft-deterrent system. The key uses a transponder that matches an immobilizer control unit in the vehicle. Only the correct key starts the vehicle. If the key is ever damaged, the vehicle may not start.