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Comments
you might have to change the vacuum actuator and or the vacuum actuator cable...not to difficult to do, it fixed my 4 wheel drive problem.
When your hub lock out switch fails, it can fail in the vacuumed position. This causes the front differential to be engaged which commonly breaks the thrust washer. I found the information on s10extremist.org in their technical articles link. Lots of great info there - even the instructions to fix it.
Further research, and not sure if this is as big a deal in the US as in Canada, but if you're replacing the hub lock-out switch on the transfer case the transmission experts recommend buying the part from a GM dealer - apparently the aftermarket parts in this case aren't that great. I had an aftermarket one break immediately (and I'd let my 2 yr old play with the receipt).
And lastly, if anyone can find a vacuum hose routing diagram that would be very helpful.
if not good luck!!
Anne
My 96 GMC Jimmy is doing the same thing now, have you had any luck in finding out what the problem is?
Summary: stuck in 4 high, changed encoder motor, changed tccm, still wont shift out of 4 hi. TCCM clicks, and light flashes on button, but goes to only one click and flash after trying it a few times.
I loved that small truck when it worked , once it falls apart there is no stopping to it...., here in Canada fuel pump replacement costed me $1300 lol after 1 year again the fuel gage failed after a year !!!! the fuel gage reader is in the fuel pump in the tank lol..., I need another $1300 to make my fuel gage work LOL !!!! now the truck rests off of the west coast in the ocean... I hope I never see that dancing fuel gage display ever again !!!!
brake sensor failed in the left hub and the right one was noisy. I don't think there is a solution for this problems. Just like there seems to be no solution for leaking intake manifold gaskets or the flaky fuel gauges or the failing fuel pump. The is a nice "little" SUV, when it runs!