if i want to drop my driveshaft on my front to make a 2 wheel drive on my 2002 gmc envoy is that all i have to do it is a 4wd
Why would you want to do such a thing? If your thinking it will give you better mileage it won't. Just leave the button the 2WD mode and you have the same thing, but if you don't use the 4WD at least once a month you run the risk of loss of lubrication in the front differential not to mention moisture build up, and the transfer case shift motor can become stuck as well, all leading to more expense down the road.
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