Question about 2006 GMC Envoy
4wd wont work no power beyond switch ,replaced switch and front actuator
Have you checked fuse #48 in rear fuse box and fuse #8 in underhood fuse box?
Posted on Apr 03, 2014
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Posted on Jan 02, 2017
Sure sounds like the vacuum switch is not working properly. You have done exactly what I would have done, start with the actuator(most common problem) and go from there. If your not getting the vacuum , then most likely the vacuum switch is your problem.
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Posted on Nov 30, 2010
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