Question about 2005 GMC Yukon Denali

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2005 gmc yukons computer shuts down after it heats up. Outside temperature affects how long it will run before it shuts down. All gauges and power to the engine die. Radio and lights work fine all of

Outside temperature affects how long it will run before it shuts down. All gauges and power to the engine first sputter then die. Radio and lights work fine all of the time. I can lift the hood for about 5 minutes and it will run again. this works for about 10 miles then it will not move more than a few hundred yards. I don't know what relay / fuse controls the computer and not the other electronics. The truck will idle for as long as I let it. It only shuts down when driving. If it starts acting up shifting into neutral will sometimes stop the engine from dieing. Same goes with shifting it into park. If you catch it quick enough and keep the RPMs up the truck will stabilize. Any help?

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  • 248 Answers

Check the fuel pressure under a load also GM is well known for ign module problems..

Posted on Jun 13, 2014

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Posted on Jan 02, 2017

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SOURCE: 1999 Gmc Sierra has no power

Sounds like the fuel supply is inadequate. Check for a plugged fuel filter, or possibly the fuel pump is losing pressure. I had a 93 Chevy V6 that acted the same way, and after checking everything else I replaced the fuel pump, which solved the problem.

Posted on Jun 10, 2008

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SOURCE: Truck losing power and service engine soon light on

Like to other guy said, give it a tuneup. Also try SEAFOAM to clean carb up of slug. Also check to make sure the butter fly for the choke has not come loose, causing it the choke it down. Failed choke pull-off.

Posted on Feb 02, 2009

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SOURCE: Lack of power when accelerating

You really should have a code check done. There are numerous items that can give you similar symptoms. Two places to look are the fuel filter (usually overlooked till they gum up, and the throttle position sensor (but test it first with an ohmeter. You will need a manual (vehicle specific ones are available at most larger parts stores and most of those stores also do code testing free)

Posted on May 27, 2009

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SOURCE: 2002 GMC YUKON XL 1500 MOTOR DIES AFTER GOING

Check the fuel cap!! If the vacuum relief is not working it can impede the fuel flow and cause the engine to shut down or not restart after a stop. Waiting usually gives things a chance to stabalize and the engine will restsrt. When this happens again try loosening the cap and see if the engine will restart.....If it restarts immediately, REPLACE the fuel cap..Do Not leave it loose because this will cause other problems. If it is not the fuel cap the problem may be the filter, the fuel pump, or aome other fuel system malfunction.

Posted on Jan 24, 2010

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Molson02536
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SOURCE: 99 GMC Sierra 5.3L sputtering and hesitating

Check TPS for smooth and linear electrical response over the entire range of motion. If the response is jumpy or erratic at all, replace TPS.
Thank you for using fixya and good luck.

Posted on May 11, 2010

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2003 gmc yukon xl


Sorry to get your hopes up but I have a similar problem with my 2005 Yukon Denali. How long does the truck stay running before it shuts down? Mine started out with short spurts of the truck shutting down while driving. It slowly progressed to the point where it will only run for about 45 seconds. Originally the truck would sputter the gauges would die and then the truck would die. It slowly progressed to the point where it only runs for 45 seconds and there is no signs before hand. Does any of this happen to your vehicle? I have checked all of my cables and the main ground wires. Along with changing a few of the relays. Nothing has helped. My problem started with an electrical component heating up and quitting. Now it doesn't matter how hot it is in only runs for a couple seconds.

Jul 07, 2014 | 2003 GMC Yukon XL

1 Answer

2005 GMC Yukon Denali's computer shuts down after the truck warms up


sounds like a fuel problem, how many miles on vehicle? as a quick fix it would be worth using a fuel addative , you haven't said if petrol or diesel, if petrol get addative that covers the catalytic converter ,having a blocked exhaust system can cause engine to stall also get the OBD codes read as this will tell you what if any sensors/switch's are faulty

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Might help, disconnect negative terminal from battery for 10 minutes, if the compute is getting weird readings this will reset it and maybe help.

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May 14, 2011 | 2005 GMC Yukon Xl Denali

1 Answer

At about 4000 RPM the check engine light flashes and there is hesitation. The read out says misfire in #3. I have a 2000 GMC Yukon, During regular speeds it is fine. There also seams to be a hesitation...


Your catylatic converter may be clogged if your loosing power or top speed is less than it was. You can check this when its running with a battery operated infared heat gauge. the temperature of the muffler should be around the same temp. as the catylatic converter.

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1 Answer

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Jul 17, 2017 | 2005 GMC Yukon Denali

1 Answer

Engine Coolant


First make sure you have no air in the system, and coolant level is full. Then with the engine idling make sure the fan turns on at running temperature. If it does not this is what is causing the over heating problem.

Mar 30, 2009 | 2005 GMC Yukon Denali

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