4x4 does not work on 2005 GMC Envoy

lights on knob out(where shift). warning light on dash is on all time. and oviusly 4x4 does not work

by in Minneapolis, MN on December 05, 2013
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1 answer
ANSWER by , December 05, 2013
You will need to have the system diagnosed by a shop that has the TechII scan tool.