Question about 2005 GMC Envoy

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2005 envoy hesitates while driving

While driving at highway speeds it hesitates, rpms go down alittle. tranny shifts fine

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

saberwolf67
  • 21 Answers

SOURCE: Seems to miss at highway cruising speed

try changing your fuel filter

Posted on Nov 23, 2008

  • 1 Answer

SOURCE: transmission shifts hard down from highway gear only (D>3rd)

I had the same thing! It was a computer issue. It only cost me about $35.00.

Posted on Dec 29, 2008

AaronTech
  • 115 Answers

SOURCE: 2005 Mazda6 tranny ****

1. some mazdas had a PCM/TCM update to resolve 1st to 2nd shift shock. the only one who can update the is the dealer. maybe covered under 5 year 100,000kms powertrain warranty.

2, have you ever had the transmission fluid replaced? it could be dirty, burnt, etc.
if it was replaced, maybe it was replace with fluid other than M5 fluid. different fluids have different properties (thickness etc) which could cause serious problems if left.

I would recommend taking it to the dealer for the update and a transmission flush (not a drain and fill) using a flush machine.

Posted on Jun 24, 2009

emissionwiz
  • 75814 Answers

SOURCE: The engine boggs down at high rpm. For instance,

if the fuel filter hasn't been changed do so, if the fuel filter is ok and has been changed out due to this problem you will need to monitor the fuel pressure under a load and make sure it doesn't drop below 45 PSI, it it does you will need to replace the fuel pump and the fuel filter. U also do say if you have a check engine light or have had the system tested for trouble codes that may be triggered by this loss of power problem.

Posted on Sep 08, 2009

  • 204 Answers

SOURCE: 1993 Mazda 626 auto trans shift hesitation when warm

Have your checked your trans fluid?

Posted on Feb 03, 2010

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