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2005 GMC Envoy No gears

Tiny
KEVINSBBY1
  • MEMBER
  • 2005 GMC ENVOY
  • 4.2L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 160,000 MILES
Was driving interstate let off gas to exit when I gave it gas again it just reved motor no noise nothing
Tuesday, October 20th, 2015 AT 4:09 PM

5 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,328 POSTS
Is the transmission fluid clean and full? Is the check engine light on?
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Tuesday, October 20th, 2015 AT 5:55 PM
Tiny
KEVINSBBY1
  • MEMBER
  • 3 POSTS
Fluid was normal and no lights at all came on. We changed fluid and filter just in case but still nothing
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Wednesday, October 21st, 2015 AT 3:16 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,328 POSTS
Without a light, it becomes a guessing game. If I had this in my shop, I would first start by checking fluid pressure. There is a pressure switch that can go bad, a pump, and the torque converter.
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Thursday, October 22nd, 2015 AT 5:26 PM
Tiny
KEVINSBBY1
  • MEMBER
  • 3 POSTS
Can you tell me how I would check the presser and the presser switch or the tork converter
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Thursday, October 22nd, 2015 AT 5:37 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,328 POSTS
Basically, one uses an oil pressure gauge and splices it into one of the transmission cooling lines. That will identify what pressure is present. Once that is done, then it becomes a process of elimination. Checking each component to see which has failed.
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Thursday, October 22nd, 2015 AT 6:08 PM

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