How do you program a keyless remote for a 2004 gmc Yukon XL?

Answer 1

Locted directly under the drivers side steering wheel is the DLC or Data Line Connector is a set of terminal contacts. Connect a wire(jumper wire) to connector 4 and 8. They are not numbered. Any wire will work, but I used a standard rigid wire to cross connect these 2 pins. it will automatically lock and unlock all doors. There will be approx 16 pins. numbered top left #1 thru bottom right #16. I ordered 2 new RKE Remote Keyless Entry devices and setup these up in 10 mins. you have a minute to do this to other RKE's. (Hold down the lock/unlock buttoms at the same time.) All door locks will automatically let you know if it worked.