I have just re-programmed by VT Commodore (3 button) key following the battery going flat and button pads RS. You will need a working key and probably need to replace the head on this (which is probably due and still much cheaper that a new key). Here is how; 1. Buy new key head shells for your keys (I got mine on ebay - great and cheap, about $10.00 !!) 2. Remove the screws and prise open your old key head (of the dead key) with a small screwdriver. 3. Use a blade / small pliers to remove the battery. Get a replacement battery and place it on the circuit board. Either try to solder (watch the heat), or superglue the contacts on the new battery. I just bent the contacts towards the battery first, then superglue. 4. Remove the screws and prise open the good key, so that the key blade is loose. 5. Start the car with the good key, then slide off the head, leaving the key blade in the ignition. 6. Slide on the head of the key you replaced the battery on. The car will program the key immediately. I left it in the ignition for a few minutes. 7. Remove the key and re-assemble. 8. Do the same for the working key, suggest you replace the key head with a new shell. This process works! All up cost - $20.00 for two key shells. $3 for one new battery. TOTAL $23. I am putting pics together in an instruction manual. Email firstname.lastname@example.org for a copy.