Question about 2005 GMC Envoy

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How do I get better gas mileage from a 2005 GMC Envoy 4.2 . When towing my trailer I get 100km to a 1/4 tank

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 260 Answers

SOURCE: 2006 GMC Envoy XL gas guage

most likely a fuel sending unit problem in the tank. could also be problem in dash but sending unit is first suspect

Posted on Nov 16, 2008

  • 141 Answers

SOURCE: 2005 gmc envoy emissions light

maybe fuel fiter

Posted on Feb 15, 2009

  • 78 Answers

SOURCE: wiring diagram or fuse box diagram-2007 GMC Envoy Denali

Hi there;

Here is the wiring diagram for the trailer wiring for your truck.
Hope this helps

Posted on Mar 18, 2009

  • 3854 Answers

SOURCE: 2005 GMC Envoy Locked in 4WD all the time

If your luck it's going to be a $15.00 vacuum switch on the transfer case that takes about 15 min to replace, if it's the electronic solenoid to the transfer case then it's going to be cost a little more and take a little longer. If your try switching from 4WD to 2WD and hear the solenoid working by hearing the cluck's when it engages and disengage then it's going to be the vacuum switch on top of the transfer case on the drivers side. Auto Zone Sell's them for $15.00 and they will have the step by step instructions to replacing the switch. They will also have the transfer case solenoid  too, if you don't hear the solenoid. Check the fuses, the fuse may have gone bad. Good luck and hope this helps.

Posted on Jun 19, 2009

  • 1 Answer

SOURCE: gas gauge not woking properly gas tank only accepts a little gas

I had the same problem. My gas gage would read full and as I drove the gage would read empty; even when I had a full tank of gas. All I had to do is buy a new gas cap... yes that is all! $15.00 and a day later the gas gage is fixed.

Posted on Jun 23, 2009

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1 Answer

Engine misfires on cyclinder 6

There is a good chance that you have developed condensation in your gas tank ( water and gas don't mix) try putting gas line antifreeze to help dissipate the water.

Jan 16, 2014 | 2005 GMC Envoy Xl

1 Answer

Bad gas mileage GMc envoy 2002

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.

Jan 15, 2013 | 2002 GMC Envoy

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Using oil looking for possible fix on a 2005 envoy denali

GMC Envoy problems and GMC Envoy repair histories -- car repair descriptions reported ... by car, to see how many repairs each car required and where the car is located. ... 5.3L V8; 2006 291-horsepower 4.2L I6; 2005 275-horsepower 4.2L I6; 2004 ... Advised by OnStar not to drive and have it towed. ----------------------------------------------
galletto 1260

Dec 20, 2012 | 2005 GMC Envoy Denali

1 Answer

2005 GMC Envoy trailer lights

Check the white ground wire on the plug on the vehicle.

Aug 23, 2012 | 2004 GMC Envoy

1 Answer

How to fix bad fuel economy. I just got 37km to 1/4 tank. There is something wrong. What is it?

to test properly you have to fuel to full drive 100 km return where you filled up and check for example 100 km = $10 to 10 liters gas so the level of fuel has to be exact and the price of gas the same as well the liters of fuel used as well if you drive under 100km an hrs it helps as well in the winter running the car to warm up takes gas as well also the tire pressure all equal oil change to date spark plugs replaced air filter clean there are so many things to take into account so double check all to save more

Feb 28, 2011 | 2005 GMC Envoy

1 Answer

Fuel consumption increasing, now averaging +15 l/100km. Notice engine has a whine to it.

Clean your throttle body for starters. The whine could be a multitude of things, but wouldn't contribute to the loss of fuel. Also, replace your spark plugs with AC Delco 43-103, other Platinum plugs don't work well with Envoys/Trailblazers. Also, probably time for an 02 sensor change, the one upstream in the engine compartment. These things will all help increase fuel mileage.

If you want more SEAFOAM in the brake booster, and gas tank to clean the carbon out, but after you run a tank, might as well replace the fuel filter too.

Nov 22, 2010 | 2003 GMC Envoy

1 Answer

Can a 2008 4wd (4 x 4) GMC Envoy be flat towed? If so, what is the procedure? Will it register miles on the odometer?

any 4x4 should be trailered, as dammage to the trans or transfer can result, if you have to tow i recommend you remove the drive shafts

Sep 15, 2010 | 2008 GMC Envoy

1 Answer

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.

Apr 15, 2010 | 2005 GMC Envoy Xl

1 Answer

I have 2005 GMC Envoy. I noticed the gas

The new design filler neck on newer gm vehicles don't have a flap. The flap was just to keep stuff from falling in. I've had problems with the fuel sending unit in the tank on these vehicles.

Jan 01, 2010 | 2005 GMC Envoy Xl

2 Answers

Wiring diagram or fuse box diagram-2007 GMC Envoy Denali

Hi there;

Here is the wiring diagram for the trailer wiring for your truck.
Hope this helps

Mar 07, 2009 | 2007 GMC Envoy Denali

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