Question about Cars & Trucks
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Posted on Jan 02, 2017
SOURCE: 1990 GMC Sierra 4x4 1500
the connections near the front axle that activate the motor to engage the system aren't melted? That's a comon problem for that body style. If there good, sounds like it could be that motor itself. To figure out if it's you motor or transfercase, jack up the rear end, have a friend inside shift into 4 wheel drive, or try to, and put it in gear and apply some gas. If the front driveshaft is turning then it's something with the front end. If not, farther back in the system.
Posted on Sep 22, 2008
Should be 2 belts. Which one did you break?
If it is the larger one there is a tentioner to your left of the center of the engine as you are facing the engine, somwhat centered relative all the other stuff there. With everthing tight in the engine compartment it took me a couple of minutes to recognize it.
If it is the smaller fan belt, I had to take the fan off and adjusted it the old way, with a pry bar. Off to your right of the center of the engine as you face the engine there are 3 bolts kinda grouped together. I donot recall which one you loosen, but one of these will give you slack, use a pry bar to snug the beld up good, then tighten (while holding tight). Reassemble the fan.
Hope this helps.
Posted on Feb 14, 2009
the 4x4 don't use vacuum. the front is auto lock when the transfer is engauged with the button. if the light don't which when pressed into 4hi or 4low. the motor on the transfer case maybe hung up. they have to be used at least 4 times a year not to go bad. the motor is on the back side of the transfer case. best of luck.
Posted on Aug 07, 2009
Posted on Sep 16, 2009
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