Vacuum

2005 GMC ENVOY
150,000 MILES • V8 • 4WD • AUTOMATIC
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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 1:16 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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CATAFINA
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 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 2:51 PM
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HMAC300
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 48,601 POSTS
make sure your anit theft isn't engaged for no start. if no manual look online
Feb 1, 2016 at 7:07 AM