Posted 12/20/2012 22:02 (#2765127 - in reply to #2764699) Subject: Re: 4 wd not working, 03 Chevy duramax
Phillips Co NW Kansas
I don't know if your push button is anything like ours with the stick on the floor but I had the same trouble. Dealer told me actuator was bad. Bought new actuator with no luck. Kinda thought he was full of crap but he is the tech at the dealer. Turns out it was the two wire plug on top of the t case towards the back. One of the wires had broke. These wires are the ones that tell the control module under the dash that the t case is in 4wd and sends power to the front end.