How do you program a remote for 1997 Yukon?

First, hold down the unlock feature on your door and keep it held down. While holding down, turn ignition key over 2 times and turn off (dont start vehicle). The speed at which you do this is not important, but just turn to where radio will play and instrument panel lights up. After you have done this the unlock-lock will cycle on your doors automatically and the horn will sound. Now, you can let go of the unlock on door and Hold the Lock and Unlock function on the remote, Both at same time! Hold for 15 to 20 seconds until your doors cycle thru lock-unlock. They will do this automatically while you are holding both remote keys. Now, Turn the key over again and then off. This should set your remote to work. If this does not work, there may be a problem with the remote or you may have a remote not compatible with vehicle or even dead battery in remote. Hope this saves someone some time and money!