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My light has been on for a few days, won't go into 4wd and now it automatically shuts off my traction control. Love that posi-traction rearend in the snow.......reminds me of learning to drive with dads car back when there were only rear wheel drive cars
Push the buttons a few times and turn the truck off and then turn it on again and see if the 2wd light is on. I always know when mine isnt working cause the light is out. I suggested that cause before I knew what was going on I tried pushing the buttons.
My guess is RainDelay nailed it. When I took my 2003 in (after 3 tries) for the same problem it was finally the 4wd module being replaced that cured it. Somewhere on the Avalanche forum there's a thread that touched on this. Mine went into 4wd and wouldn't come out - no fun on dry pavement.
Location: looking for my insanity state of confusion
Originally Posted by scorp508
Not all of them will. Some towns have passed ordinances barring free code readings because local mechanics charged a $50 diagnosis fee to do the same thing and they got pissed at losing business.
That's the reason why some part stores will let you "borrow" the code reader, so they aren't liable. I just had to go through the same thing on my brother's 03, hopefully it's just a switch, his transfer case had a hole in it.
Sometimes you can take the dash switch apart, clean it up inside and get it working again. If your a tinkerer, take the switch apart and see what you find. If not, stop by a parts store and get the codes.