Question about 2004 GMC Envoy

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Loss of Power at Freeway Speeds

My 2004 Envoy on the freeway will lose acceleration when it goes into passing gear The RPM indicator shows 4500 RPM and will not exceed that and I am reduced to 55 MPH which takes about 4-5 miles to get back to highway speeds. Its as if the engine bogs down

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  • Anonymous Mar 17, 2014

    when i reach about 30 mph on my jaguar 2004 s type, my rpm guage goes up and down

  • Anonymous Mar 17, 2014

    when i reach about 30 mph on my jaguar 2004 s type, my rpm guage goes up and down

  • Anonymous Mar 17, 2014

    when i reach about 30 mph on my jaguar 2004 s type, my rpm guage goes up and down

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  • 37 Answers

Sounds like itr is not getting enough fuel. Try or check the fuel filter for dirt or water, and also check the fuel pump pressure to see if it meet factory specs.
Good Luck Jerry
jerry1938@hotmail.com

Posted on Dec 13, 2008

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