why won't my truck go into 4 wheel drive? on 2004 Chevrolet Silverado 1500

The 4x4 light says its on but it is not working.

by in Spokane, WA on December 21, 2013
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3 answers
ANSWER by , December 21, 2013
The transfer case control module needs to be scanned with a Tech2 scan tool to find the fault.
ANSWER by , December 21, 2013
ANSWER by , June 16, 2015
Did you ever find out what it was?