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Q: 4 wheel drive on 2001 Chevrolet S10

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
my 4 wheel hi will not engage but 2hi and 2 lo will.the lights flash,what can the matter be
No car image 94a1663db56199c5353592009e34aaa51078a2469bed068bb8d6f0ba43accf97
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Here's a trouble shooting guide for you with repair parts listed http://www.4x4posi-lok.com/PDFs/troubleshootguide.pdf sounds like its common on these transfer cases, Once you download it scroll down to get to your year make and model. Napa has rebuilt transfer case motors available for around $155 online
Check out and read this page here and he will answer your question faster than it can be explained to your here in this forum. This is a common failure on electronic shift GM 4X4's. This page goes into great detail on repairing the problem.

http://www.kylestubbins.com/node/11?page=1
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