GMC 2005 Yukon XL. The transfer case shifts from 2 hi to 4 hi w/out pressing anything. This usually happens after travelling at a consistent high speed, and then slowing down. When it is in 4 hi, it either will not shift back into 2 hi at all, or only will after going to auto 4wd. Sometimes it will not even go to 2 hi from auto 4wd. I can usually get it to go back into 2 hi after turning vehicle off and back on again. I've been through the manual and tried a few different things, but to no avail. Does anybody have anything?
SOURCE: location of fuse box/panel for 2004 yukon denali xl
The fuse for the cig lighter is in the fuse panel under the hood on the drivers side. it is marked "cig ltr".
SOURCE: 2005 gmc yukon xl denali service ride control
it has to do with your air ride suspension best bet is take it to the dealer there is probably a problem with a level sensor. hope this helps you
SOURCE: 2003 GMC Yukon XL Denali Service Ride control info
leaking suspension air bags is the most common cause, but the system can be tested for trouble codes, I suggest u do so, only the dealer can do this, but guessing about what the problem is can get very expensive very fast.
SOURCE: The Heater fan in my 2003 GMC Yukon XL will not turn off
I don't know if you already fixed it, but I had the same problem on my 03 yukon, TysonRicky is right. In my case it was the blower control module. You can find it right under the glovebox. It cost me close to $100 for a new one, but very easy to replace. Can't even imagine how much it would've cost me if I had a mechanic do it.
SOURCE: The 4wd is not working on my 2003 gmc yukon,
Does the truck have a push button selector on the dash? If so, you need to replace the drive motor on the transfur case.
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