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Re: 2001 2500hd 4x4 grinds while in 2wd high
Does the axle actuator disengage in 2wd? I may have had a similar issue with my '90 k1500. The 4wd didn't work one day, after ohming out some wires I replaced the actuator switch in the t-case. I was getting some binding in 2wd, not grinding. The new switch was bad, replaced it again and all was well. I took an ohm-meter to the parts store and tested the new switch there.
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