Service 4x4

risSSDW · December 21, 2008

How's it going? Bear with me I'm new to the whole forum thing. I'm in need of some real help. I've got a good background in auto mechanics but this one is a new one to me and I'm stuck. I tried googling it and saw such a wide range of answers my head is spinning. Anyway sorry for the ramble... I was driving my 2001 Silverado Crew Cab 2500HD in 4wd HI, parked at a convienience store and came back out, started the truck and got the "Service 4X$" light on the message center. The lights on my 4X4 switch were off and I couldn"t change it out of the 4X$ HI i was in. No funny noises or smells. The fuse is good and I scanned the ECM for codes, nothing there. Where do I go from here? Can I drive it, or anm I in danger of trashing the transfer case? Any guidance would be greatly appreciated. Thank you in advance.

DofD · December 22, 2008

Hi there and welcome to GM Trucks!

You should be just fine driving in 4wd Hi as long as it's not making any odd noises. What is causing the service 4wd message could be a number of things like you've found. I would start with the simple, like that the switch needs replacing since there is no power to the switch.