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GMC
Envoy
Engine
Crankshaft
Vacuum
2005 GMC ENVOY
150,000 MILES • V8 • 4WD • AUTOMATIC
RNDYMN
MEMBER
1 POST
Can a vacuum problem cause 4wd not to engage and ignition not to function some times ( crank shaft position )
Jan 31, 2016 at 5:16 AM
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CATAFINA
✓
Experienced Mechanic
167 POSTS
If its not starting up could be the crankshaft position sensor, for the vacuum I doubt it on the 4WD
Jan 31, 2016 at 6:51 AM
HMAC300
✓
Experienced Mechanic
48,601 POSTS
make sure your anit theft isn't engaged for no start. if no manual look online
Jan 31, 2016 at 11:07 PM
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