can it be towed 4 on the ground
NO, and if you must tow an AWD vehicle, in most cases all 4 wheels have to be OFF the ground. You'll damage the transmission and transfer cases if you do.
the only way the newer GM stuff can be towed on the ground is if it has the 6sp. automatic transmission- then it has a pump that circulates transmission fluid while you are pulling it so it doesn't burn up. Your vehicle doesn't have that, so you need to tow it with all 4 wheels off the ground on a trailer.
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