Question about 2005 GMC Yukon Denali

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

The truck will stop running all of the gauges also die. The radio and lights never stop working. The problem is temperature dependant. The colder outside it is the longer it will run. I dont believe it is the crank position sensor since the engine temperature is not the primary issue. It is the temperature inside the engine compartment. When it is cold out the truck will run for about 40 minutes, well after the engine is warmed up. If it is hot out i may only make 5 to 10 miles. Once the issue starts I can delay the oncoming shut down by kicking the truck into neutral and keeping the RPMs up until the truck settles back down. The truck will start hesitating this is when I kick it into neutral. This works a couple of times. Eventually the truck will die. After the truck dies I simply open the hood and wait about 5 minutes and it will run for about another 5 to 10 minutes. This works for a few miles then it will only make it a few hundred yards and it shuts back down. So the truck engine loses power, the gauges lose power, the engine chugs then dies. The engine will turn over it simply will not start.

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  • Brad
    Brad May 15, 2014

    I am sorry i believe it is not the crank position sensor. I did not put the "not" in the original message.

  • Brad
    Brad May 16, 2014

    Steve, the truck has 140,000 miles. The engine is gas. There are no codes i tried that first. I would think what ever the problem is would generate a code but it does not. How would fuel system shut down my gauges? I am not aware anything in the fuel system to shut down gauges but with "newer" vehicles i guess anything is possible.

  • Brad
    Brad May 16, 2014

    Dennis, Can teh crank position sensor shut down my gauges also? Wouldnt teh crank position sensor heat up with the engine? The problem happens when the engine bay gets hot not the motor. If it is cold out the truck will run between 40 to 50 minutes before it shuts down. The truck engine is very hot by then. If it is hot outside it only makes it 10 miles or so.

  • Brad
    Brad May 16, 2014

    Bret, The battery cable was the first thing i checked. I tore the cable all of the way from the battery to the fuse on the side of the motor and to the fuse box directly beside the battery. The wire seemed good to me. I did not have anyone check the cables. Couldnt i check the resistance across the cables since voltage drop is tied to resistance across the cable? Thank you to everyone for help with this. I am a back yard mechanic. I typically only deal with mechanical issues, electrical issues drive me nuts due to the fact an issue can have hundreds of causes.

  • Robert Rummelt Jun 09, 2014

    the truck is overheating check the thermostat



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  • GMC Master
  • 3,679 Answers

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

Posted on May 16, 2014

  • steve May 16, 2014

    i\'m a bit old school ,all this electronic crap, but these symptoms a very much like a blocked exhaust/air intake /starving petrol problem on a proper vehicle (pre 1985 ish) try a run with the exhust undone slightly and air intake pipe off ,noisy but if goes ok then thats where i\'d be looking, blocked exhaust,poor air intake etc can cause engine to overheat , this heat will affect the electronic crap thats supposed to be helping you ,just my idea , hope you get it sorted keep me updated cheers



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SOURCE: 1996 Dodge Ram 1500 4x4 5.2L engine. Truck stalls

Hi, I have the same problem, I'm sorry I can't help, but if you figure it out please let me know.

Posted on Jul 11, 2010

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SOURCE: 1995 dodge ram won't start when warm

Yes the crank sensor can cause this problem, they go open when hot.

Posted on Nov 11, 2008

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SOURCE: 1998 Volvo S70 won't start when cold!

Check the B+ cable. If you remove the fuse box cover in the engine compartment (on the drivers side), and you'll see a post with a nut on it, securing a group of red wires. The connector should be a clean copper color. If you take it to a shop, have them perform a voltage drop test on the cable. If it is corroded or burnt, replace that cable!


Posted on Dec 04, 2008

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SOURCE: Temperature gauge past "H", air from heater comes out cold.

open thermostat or instrument voltage stabilizer.

Posted on Jan 19, 2009

GM Elec
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SOURCE: 95 Lumina Sedan Over Heating (?) problem

Please check your engine oil and transmission oil dip stick. Make sure neither is a milky color. If both are OK, check to make sure the carpet on the driver and passenger sides are dry underneath the carpet. I all of that is good, the engine has to be consuming the coolant. Possibly leaking at intake manifold to cylinder head and out the exhaust instead of burning in the combustion chamber.
Let me know what you find and we can go from there.
Also, is the engine running good other than the coolant issue?

Posted on Feb 25, 2009

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