Mechanics

4WD ISSUES

2002 GMC Envoy • 4WD Automatic •

Hello. My 2002 GMC Envoy changes from 2wd to 4hi and 4lo on its own when I start it. And then when it does change to 4hi, in reverse it does it with hesitation. What do you think the problem is?
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Aspen4535
January 19, 2011.




Check the wiring to the 4wd actuator on the transfer case. Make sure there is no damage and the wiring plug is not damaged or corroded.



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