Flatrater, thanks a million! I just bought a Jimmy that came with an old broken keyfob. I bought a new one from the dealer knowing I could find something on the web to program it. Thanks to your post I will NOT be going to the dealer or anybody else and paying to program the keyfob. One side note to people using this post to program their keyfob, it takes about 15-20 seconds before the keyfob locks and unlocks the doors. Once it does, you are finished unless you have more than one keyfob. Thanks again, Flatrater.