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Thread: Strange problem
12-27-2012, 11:58 AM #1
Hey guys so I have been having this issue for awhile now but I thought I would be able to fix it by replacing the 4 wheel drive switch. My truck has been throwing itself into 4 wheel drive randomly. I'll be driving down the road and I'll look over and the 4 low/high will be lit but not on the dash? And sometimes when this happens I also lose almost all engine power and I can barley get up any speed until I pull over and put it back into 2 wheel. What is going on with the truck? It happens randomly but sometimes at the worst time.
Oh and this problem isn't throwing a trouble code.
Last edited by sierra11; 12-27-2012 at 12:16 PM.2004 GMC Sierra SLT 6.0L 4x4
UWS Low Profile toolbox 10% tint front and over stock back tint
AirAid MIT and K&N airfilter BlackBear Performance
12-27-2012, 03:54 PM #2
12-27-2012, 04:23 PM #3
What I changed was the 4 wheel drive switch which is the module that houses the 4 hi 4 low, etc. A new TCCM? I'll look into that and see. What I don't understand is how is this not throwing any kind of code?
12-27-2012, 04:49 PM #4
Does the "service 4 wheel drive" light ever come on?
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