GrantG82
New member
Ok i just bought this truck (99 Jimmy 4 button 4x4) and the 4x4 didn't work the lights on the buttons didn't even light up and service 4x4 was on so i replaced the tccm and tried it and the button lights came on the service 4x4 went out and seemed to be working, not sure though but that only lasted about 2 or 3 mins then the button lights went back out and the service 4x4 came back on. But when you turn the truck on now the tccm clicks about 4 times is that normal? and every once and a while the button lights come on as normal and the service light goes out then shortl after it goes all screwy again. what should i look at next?