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4 wheel drive

(2001 Chevrolet S10)
in Center Harbor, NH on March 03, 2009
my 4 wheel hi will not engage but 2hi and 2 lo will.the lights flash,what can the matter be
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on March 04, 2009
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
on June 20, 2010
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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