2000 GMC Sierra


July, 13, 2009 AT 6:43 PM

Transmission problem
2000 GMC Sierra V8 Four Wheel Drive Automatic 130000 miles

my first question is about my transmission: while under acceleration, I hear clicking noises, like there could be something inside my diff case. I removed my differential cover, I had plenty of fluid, there didnt seem to be any problems. What could the clicking be related to?

my other question: my " service 4wd" light comes on, usually when I use 4wd, but occasionally when im driving for no apparent reason. When I turn hard in 4wd, it often makes a " groaning" noise. The bigger concern, is that about 50% of the time, the truck doesnt want to go in or out of 4wd. It is a push button 4wd. Thanks for your help


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