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What would make my service 4wd light come on

(2002 Chevrolet Trailblazer)
in Buffalo, NY on March 16, 2014
Sometimes it won't switch from 4wdauto back to 2wd and the service 4wd light comes on if you turn the vehicle off and start it again it will be fine
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Popular Answer
of G. T. Service Center on March 16, 2014
Check for codes in the transfer case control module and post the code, possible c0306.
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