Question about GMC Envoy XL

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What type of gas is good for gmc - Envoy XL GMC Cars & Trucks

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You only have 3 grades to choice from

Use what your owners manual calls for

Posted on Mar 17, 2011

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6ya6ya
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Posted on Jan 02, 2017

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1988 gmc 1500 truck acts like running out of gas will quit running then will start back an do same thing again has plenty of gas in tank


look for vacuum leaks anywhere ..check under cap/coil for wear/dirt on ignition parts replace if dirty/blackened or wet..pull a plug and look for blackened tips or carbon bildup..replace plugs if dirty..is the truck carburerated or tbi..clean with stp carb and tbi cleaner..it will remove built up varnish and gunk in/on the throttle plate and jets..also some filters have a backpressure valve in them to prevent vapor lock in older vehicles that had this issue..if you can blow thru it should work ok..if not needs replaced with type that doent have the valve in it.(has arrow that shows flow direction)..good luck repost findings

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I have a 2006 GMC Sierra pickup. Since I started using E85 gas, mileage has dropped drastically. Can you tell me if I need to ues a different type of spark plug? Thanks, Will


These trucks with the flex fuel systems will not get as good of milage on E85. They are designed this way. I haven't heard of any kind of spark plug that will help you in this. It is kind of a trade off, better milage but gas is more expensive, E85 is cheaper and more enviromently freindly but gas milage suffers. I also have a 2006 Chevy but did not get the flex fuel for this reason. On my car I use it and the milage suffers a little but with the trucks you will see even less milage due to the fact that trucks get worse milage than cars to begin with.

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Hi I have gmc Yukon 2002. In my country there is to type of gas Premium 91 and premium 95. What type I should use for my yukon??


Are you in a high elevation? if so you could benefit from premium fuel. Otherwise there is not much to gain for the price. You might get a extra horsepower or two and a tad better MPG. Save your gas money and put it to better use on a synthetic oil change. It will give you better MPG and HP and longer oil life less friction lower heat will make that GMC happy I love my GMC also

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1997 GMC Savana cutaway van 3500 fuel filter location


cartrigde type is locted at the top of the crossmember just forward of the gas tank on driver side of the vehicle,,,,,,,,non cartradge type located on front of the fuel tank..

Jun 29, 2010 | 1997 GMC Savana

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My gas gauge & speedometer gave out on my 2004 gmc yukonis there any recall on this type of situation?


Yes there is a recall for erratic gauge readings. They will supply new instrument cluster and labor to install it at no charge to you. Tell the service writer that your gauges only work sometimes and they'll help you out. worked for me!!!

May 20, 2010 | 2004 GMC Yukon

1 Answer

1996 gmc 1500 idels when I give it gas it bogs out an backfires


how do you know the fuel pump is good? what is the fuel pressure.? this truck needs 55-62psi. to run. if its 50PSI i will not run.

Sep 18, 2009 | 1996 GMC Sierra

1 Answer

1994 jmc jimmy 4.3 vortex spider fule inj.


What size and type of plugs are you running in your vehicle. If you are running spit fires they make everything hotter and are known to cause this problem especially if not gapped correctly

May 16, 2009 | 1994 GMC Jimmy

2 Answers

1995 GMC 1500 sierra loses power


The bad typing is hard to understand.I ll take a stab at it anyway.You replace the plugs,distibuter,feul filter, and the air filter.Did you notice that i dont even care about the sea foam garbage.When you replaced all that stuff did you do the spark plug wires or the rotor or the coil or the fuel pump?Maybe your mechanic needs to make a few extra bucks off that last job he did for you.Good luck

Jan 22, 2009 | 1998 GMC Sierra

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