2004 Pontiac Montana Owner's Manual - Page 144

If the engine still does not start, and the key appears to be undamaged, try another ignition key. At this time, you may also want to check the instrument panel PASS KEY fuse. 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 or a locksmith who can service the PASS-Key® III to have a new key made. See Fuses and Circuit Breakers on page 5-107. It is possible for the PASS-Key® III decoder to learn the transponder value of a new or replacement key. Up to 10 additional 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 or a locksmith who can service PASS-Key® III to have keys made and programmed to the system. See your dealer 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. Canadian Owners: If you lose or damage your keys, only a GM dealer can service PASS-Key® III to have new keys made. To program additional keys you will need two current driver's keys, black in color. You must add a step to the following procedure. After Step 3, repeat Steps 1 through 3 with the second current driver's key. Then continue with Step 4. To program the new key, do the following: 1. Verify the new key has PK3 stamped on it. 2. Insert the ignition key in the ignition and start the engine. If the engine will not start, see your dealer for service. 3. After the engine has started, turn the key to OFF and remove the key. 2-30