Service 4WD light
I have a 2004 Chevy Silverado Z71. The Service 4WD light came on a little while ago and hasn't gone away. I've replaced the control module under the dash and the switch. Only thing I can find to do now is go somewhere to have the codes looked at. One thing I can't find is where to have them read. Any suggestions where I can go? I'm trying to keep the truck out of the shop.