Question about 2002 GMC Envoy

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Bad gas mileage GMc envoy 2002

13 miles per gal

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  • GMC Master
  • 450 Answers

Thats probably what it gets, tune it up, change air and fuel filters, E3 spark plugs, plug wires, what ever it takes to make it run better, drygas in fuel tank, every fill up, (red bottle, has fuel injector cleaner) todays gasoline has 10% ethanol in it, not good for older cars.

Posted on Jan 15, 2013

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Posted on Jan 02, 2017

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SOURCE: 2002 GMC Envoy is having

I ran into this concern with my 2002 and my wife ran into the almost identical problem with her 2003. this may sound silly,, but it was the clutch fan. Extreme loss of power from time to time came first. Then a roar of the what seemed like the engine when stopping. Actually cut off after it started to roar at highway speeds, and had absolutely no excelleration from time to time. Sometimes all of the symptoms completely went away. After taking mine to the dealer several times, finally they got it right and replaced the fan clutch. When my wifes 2003 SLt started doing the exact same thing as my 2002 had done, we both knew what the problem was, and the dealer did a quick fix. $600.00. Perhaps this should have been a recall feature, but never was. Everyone that I know that has an envoy, somewhere around the 72,000 and 103,000 mile mark has had this problem and have had to have the clutch fan replaced. It may sound like the vehicle is going to have to be junked,, but that is all it needs.

Posted on Dec 01, 2008

mechanicm639
  • 253 Answers

SOURCE: POOR GAS MILEAGE

Have you changed the fuel filter? I know it sounds weird but a plugged filter will make a truck use more gas. The computer tries to compensate for less fuel by commanding the injectors to open longer. Also a plugged filter will cause excess back pressure on the fuel pump making it loud.. Good Luck.

Posted on May 29, 2009

hotrodtod38
  • 141 Answers

SOURCE: 2005 gmc envoy emissions light

maybe fuel fiter

Posted on Feb 15, 2009

fixyathing
  • 341 Answers

SOURCE: "Low Fuel" light stuck on

stucked sensor problem or a loose connection. check the sensor assembly located on the fuel tank. caution on working with flammables

Posted on Aug 17, 2009

  • 201 Answers

SOURCE: 2005 GMC Envoy XL 4x4 4.2l PO172 enigne too rich

Well the first mistake you did was not take it to your GMC car dealer and let them check it out. It could be a computer problem inside the dash somewhere. Hope this helps!?

Please rate solution - Thanks.

Posted on Apr 15, 2010

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What is the biggest tire that will fit a 2004 GMC Envoy XUV with OEM 17" wheels? Will a 275/60-17 tire fit?


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