Service 4WD Light is On

tumbleweed55 · November 25, 2003

Ok...so I have a 2000 GMC Z71, a year ago I put a new transfer case (Brand New) in it. It stemmed from a rip out of the rear end due to bad HT on the gears. All of a sudden my Service 4WD light has been flashing on in the dash, anyone have insight into what may be the problem here? I have talked with a few people and have come to the conclusion that changing the switch in the dash (electronic 4X4 bites sometimes) is the more likely than not to correct the problem. Anyone have insight into this problem themselves?

99silveradoz71 · November 26, 2003

Yep, had my light come on, then go off when I would restart the truck. Then it'd come on again. The switch was replaced and that was the end of the problem.

Gilbert · November 26, 2003

GM released a TSB concerning problems customers have been having with some of their 4 WD trucks. I don't know if your problem is related, but it might be worth looking into.

Kania2k1 · December 11, 2003

I had that same problem a year or so ago, and just swapped the switch. Problem solved.

JRod · December 12, 2003

Heya folks, Jared here...

I'm having this problem as well. Can anyone dig up a part number on that switch? Or possibly a general location? Any help would be greatly appreciated.

Thanks!

Jared

Big Bert · December 16, 2003

This same thing happened to me today. So I tried to engage it and it seemed to work just fine but the light was still on. I would shut the truck off and restart and no light for awhile then it would come back on. What switch did ya all change out??Was it the one in the cab the actual one u push or are you talking about an external one somewhere.thanks

traxion · December 22, 2003

Had the same thing happen to mine. Just had to replace the whole '4X4' switch panel. Ive heard that they go out alot of times. Anyways got that put in and works like a charm.

-Calib

2001 GMC Sierra Z-71

electromag8 · January 8, 2004

:cheers Just replaced mine last weekend, problem solved GM part #15709327. Took 10 minutes to install. $50.00 at the stealer, I tink that its $32.00 at gmpartsdirect.com. http://www.gmpartsdirect.com/

RJNehus · April 20, 2011

Just bought my 2005 GMC one month ago with no problems. I pushed the OnStar button, they gave me six months free. within four minutes the Service 4wd came on across the info screen. Has anyone had this happen?