Question about 2002 GMC Envoy

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2005 gmc envoy emissions light

The emissions light on my 2005 gmc envoy came on went off and now has been on for about 2 weeks. The truck has 33,000 miles on it. I changed to a higher octane and that didnt help and its not the gas cap.

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Maybe fuel fiter

Posted on Feb 15, 2009

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Gmc envoy 2005 problems


1st, is the check engine light on?...How many miles on he vehicle? I would suspect the throttle position sensor (TPS) . Also, the mass air flow sensor (MAS)....Or,it could be you just need new spark plugs and, or, wires....

Jun 12, 2014 | 2005 GMC Envoy

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

2005 gmc envoy engine shuts off


I have a '05 Envoy, 65k miles.
The engine randomly turns off. At a stop light, while making a turn.
There are no check engine lights on.
Starts right back up. Major pain at intersections.

May 29, 2012 | 2003 GMC Envoy

1 Answer

Engine Light comes on, I added a higher octane gas and inflated my tires then the light went off.......3 weeks later the light came back on


When the light comes back on, take it to Autozone or a place that will check the code for free. Let me know what # pops up on the printout they give you.

Apr 20, 2011 | 2005 GMC Envoy Xl

1 Answer

What is the gap for a spark plug on a 2004 gmc envoy?


.040 to .044" would be normal. The gap should listed on the emission sticker under the hood. Make sure you use the O.E. AC/Delco plugs. This engine will run on those the best!

Mar 20, 2011 | 2005 GMC Envoy Xl

1 Answer

I have a 2005 Envoy XL, within the last few days it seems like it is hesitating some when excelerating. Today my wife said the check engine light came on. According to the owners manual an emission control...


Could be many things. Take the vehicle to a place like Autozone. They will hook an OBDII reader up to your truck. This will read a specific code. Let us know what the code is, we can go from there. The code will start with Pxxxx

Feb 03, 2011 | 2005 GMC Envoy Xl

1 Answer

I have a 2003 GMC Envoy XL with 150,000+ miles and an automatic transmission. Starting this week, the engin began to rev very high as it transitioned from 1st to 2nd gear. it's very sluggish. Once I get it...


Sure sounds like a slipping transmission to me. When is the last time you changed the transmission fluid? Before you go dumping $2,600 for a new transmission, I'd do a transmission fluid change first. If you do change the fluid, use Dextron 6, it's GM's new transmission fluid, much better than the fluid you have now. Not to scare you, but my transmission went out at about 100k miles, so you're doing good if it hasn't been rebuilt yet.

Jan 21, 2011 | 2003 GMC Envoy Xl

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Bought the envoy w/ 70,000 miles, fresh oil change. @ 74,000 miles it was 1.5 qrts low, put in 5w30, checked oil 2 weeks later it was 1 qrt low. do not see smoke or any leaking.


I just bought a 2005 envoy too. I read in the manual that the 4.6 6 cyl engine needs 7 qts total. 2 Over the normal oil change. Is it possible it wasn't low to start? I noticed when Walmart changed the oil they charged extra for the change because it needed the two extra qts. However my dip stick has oil over the full mark. Seemed strange but I haven't had any leaks and after 3k mile no change in level. Make sure you had the correct about the first time.

Dec 29, 2010 | 2005 GMC Envoy

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