Question about 2003 GMC Yukon Denali

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2005 yukon denali gas goes in slow and check engine light is on it tells me to tighten fuel cap

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It may be a loose fuel cap or it is worn out already. Check also the hoses leading to and from the fuel tank for loose or bad ones that need replacing.

Posted on May 27, 2011

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I have a 2005 gmc yukon with gas fumes coming from fill tube area. No visible leaking.


you open the fill door and you smell gas?

is the check engine light on?

is the filler tube rusted?

have you tried a new fuel cap from the GM deal (do not use aftermarket caps from your local parts store)?

Apr 02, 2013 | 2005 GMC Yukon

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Fix engine light


Not likely.... But as you just put fuel injector in make sure your fuel cap is tight cause if its not the computer will detect a evaporation leak in the gas tank. So tighten the gas cap and drive the car for a few days & see if the engine light goes off .. If not get the computer scanner to see what's going on

Feb 09, 2012 | 2005 Cadillac STS 4.6

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Check engine light on and tighten gas cap comes on. I've replace the gas cap and it still happens. 2006 Denali 6.0L engine


I just repaired this problem this past weekend. It is the Emission Control Solenoid. It is located next to the fuel tank. The cost of the part is about $30.00 from the dealer. It has one electrical connection and one hose attached. The total repair, including jacking the truck up was about 20 minutes.

Sep 19, 2011 | 2006 GMC Yukon Xl Denali

1 Answer

I have a 2004 Yukon denali and while driving, I got check gas cap alarm. 2 miles later check engine light is on. Checked gas cap, cleaned gasket and tightened. Drove for 2 days. Reset fault and drove 160...


Hello, have you tried to unhook the negative side of the battery for about 10 minutes and then go from there . It should reset the computer completely .

Sep 14, 2011 | 2003 GMC Yukon Denali

1 Answer

Tighten gas cap and then service engine soon lit. Replaced with factory new cap and reset service engine soon light by disc negative battery lead. about 2 drives later the tighten gas cap lit again then...


Doesn't completely sound like a fuel pump problem...sounds like a vacuum line problem .... check your pcv ...and vacuum lines and when was your fuel filter last changed and how many miles are on the car...your fuel pressure regulator solenoid needs to be dry on the vacuum side too...diaphram could be leaking but if you can't find an obvious problem I would definiately find a qualified mechanic to dive into it...do you have access to a scan tool to read the trouble codes?

Jun 03, 2011 | 2006 GMC Yukon Xl Denali

1 Answer

Service engine light staying on


Hello tdamm...No...the service engine soon (SES) light on your yukon is not telling you to change the oil.
This is a warning light that is illuminated when there is a problem affecting the Emission system and the engines computer management (ECM) has detected it from a fault. It could be something as simple as a loose or defective gas cap. If the SES light is blinking, it's more serious....
The yukon needs to be connected to diagnostic equipment (scanner) for fault diagnosis.
You can go to autozone they will hook up an OBD II scanner to your vehicle and explain the codes to you.
Good luck...i hope this helps and will fixya up.

May 25, 2009 | 1999 GMC Yukon Denali

1 Answer

Unfixable Denali


locate the coil pack.... pull one spark plug wire at a time... any change in how the motor runs ... replace it and move to the next wire. if you pull a spark plug wire and there is no change you have likely located the problem.
a couple things... if the check engine light is on stop into autozone and have them read the codes (free) also another possibility is a plugged catylitic converter.

Robert

Feb 12, 2009 | 1999 GMC Yukon Denali

1 Answer

'04 GMC Yukon Denali Check Engine Light


Did u put in fuel shortly before the light came on? I own 2 service centers & the most common situation with "Check Engine" lights are because the fuel cap wasn't re-installed or not tightened. When you refuel make sure it "clicks" when putting back on. We don't charge for a "Code Reading" but a dealer will, don't go there. Go, like the others suggested. If it is the fuel cap & you re-install it correctly, the light will go off after a short drive. Good Luck. PS-Don't panic when the "Check Engine" light comes on unless it blinks, if that happens don't drive. PSS-RE: Murray's, Auto-Zone.......If it's a "Code" (the reader will give a #) the code book will tell you the problem. PSSS-Some1 please have Troy W's Mommy & Daddy take away his keyboard. Just because you can put together a "Lego" car doesn't make you a master mechanic. You only repeated what we said except you have a "Napoleon" complex against any1 plugging something in to a vehicle. It's the same as plugging in a light @ home. In conjunction with "kinder" nine out of ten time in my experience it usually is the oxygen sensor(s) which would be about right with the year model

May 18, 2008 | 2001 GMC Yukon Denali

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