Can't seem to get 07 GMC Envoy into program mode.
Ordered a new key fob for this vehicle and have to program it. Problem is I can't get the vehicle into program mode. I come close to it but I can't seem to get the lock/unlock cycle to occur AFTER releasing the unlock button on the door panel. It seems to cycle just when I'm turning the ignition key to the off position the second time that it cycles and the unlock button is still depressed. At this point, the vehicle is not in program mode. Numerous attempts to get into programming mode had the same results. Maybe the fact that I bought this vehicle from a private owner that had done some mods such as an upgraded sound system with Bluetooth and a speed chip. I don't know if these would affect the programming but thought I'd mention it. I would appreciate any ideas on this. Thanks