2003 Cadillac DeVille Owner's Manual - Page 91

If the engine does not start, and the key appears to be undamaged, try another ignition key. At this time, you may also want to check the fuse. See Fuses and Circuit Breakers on page 5-94. 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 who can service the PASS-Key@lIIto have a new key made. It is possible for the PASS-Key@lll decoder learn the to transponder value of a new orreplacement key. Up to 10 additional keys may be programmed the vehicle. This for procedure is for learning additional keys only. Canadian Owners: If you lose or damage your keys, only a GM dealer can service PASS-Key@lllto have new keys made. To program additional keys you will require two current driver's keys (black in color). You must add a step to the following procedure. After Step 2, repeat Steps 1 and 2 with the second current driver's key. Then continue with Step 3. To program the new key do the following: 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 will not start see your dealer for service. 3. After the engine has started, turn the key to OFF, and remove the key. 4. Insert the key to be programmed and turn it to ON within 10 seconds of removing the previous key. 5. The SECURITY light will turn off once the key has been programmed. It may not be apparent that the SECURITY light went on due to how quickly the key is programmed. 6. Repeat the Steps 1 through 4 if additional keys are to be programmed. If you are ever driving and the SECURITY light comes on and stays on, you will be able to restart your engine if you turn it off. Your PASS- Key@lllsystem, however, is not working properly and must be serviced by your dealer. Your vehicle is not protected by the PASS-Key@lll system atthis time. If you lose or damage a PASS-Key@ Ill key, your dealer to have a new key made. In an emergency, contact Cadillac Roadside Assistance. See Roadside Service on page 7-5. 2-22