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There is a vacuum actuator under your battery. When you push your button it activates your transfer case motor. Then the vacuum actuator is attached to a cable that goes to your front differential. These vacuum actuators have been known to go. You can either replace this unit or look for something called "4x4 posi lock." It replaces the vacuum actuator completely, but it is a modification and a handle will go under your dash. You would push the button as normal then pull the handle. The benefit of this would be that it is more reliable and you can use your low gear in two wheel drive if you need to by not pulling the cable...hope this helps....goodluck
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Why is my 1992 Chevy truck heater switch not working?
Sometimes switches wear out, which could be the reason the switch in your 1992 Chevy truck is not working. There could also be a problem with the wiring. You may also want to check the fuse for the blower to see if it's bad.
Your 2000 Chevy 2500 4x4 brake lights arent working ive replaced everything what could it be Ive put new fuses in new bulbs and changed the switch. What could it be?
your break switch on your break pedal.
My brake lights arent working in my 97 Chevy lumina what could it be?
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Replace your heater selector switch
My dashpanel lights stopped working in your Chevy Monte Carlo ss 2001 what could the problem be?
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1966 Chevy pickup key starts it but does not turn it off?
Could be a bad ignition switch....
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