I tried the general discussion and no luck so i'll try it here. Is it possible for the transfer case on my 96 Yukon 4x4 four door to be stuck in four wheel drive? The reason i'm asking is because my mileage has been cut in half since it snowed up here in Canada and I had to use my four wheel drive for a few kms. The switch on the dash flashes when going into 4x4 and stays solid when i'm using it. When i'm done and put it back into 2wd the 4wd light goes out and the 2wd goes on. The truck drives like it does in 2wd but it feels like it's fighting against something. New plugs, cap, rotor, wires, fuel pump, fuel filter and full fuel injection cleaning and flush. Thanks