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Hi, I am a first time diesel owner and just purchased a used Silverado 2500 HD with Duramax and Alison transmissioin. I took it out last Friday with my boat and it broke down at the gas pump. I turned off the truck to refuel and when I went to start it it took a few attempts to start and then died as I put it in park. It had no problems turning over but semed to not be getting fuel. Long story short, I got it to the dealer but am waiting for the diagnosis. any ideas on what may be the problem and if it's covered under the powertrain warranty or any other warranties? I fell in love with this truck the first time I hooked my boat up to it but I'm feeling a little cold after it stranded me. Any help, suggestions or condolences are appreciated.
 

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truckn'
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this might be a dumb question, but i'll ask anyways...did you put gasoline in it?
 

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Crank Position Sensor or Cam Position Sensor, Did you try priming the fuel filter to see if there was fuel to that point? No engine light?
 

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I did not prime the feul filter at all and there were no engine lights other than battery after cranking several attempts. Would it be the fuel injector pump or fuel pump? I am hoping that whatever it is is covered under the warranty.
 

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I did not prime the feul filter at all and there were no engine lights other than battery after cranking several attempts. Would it be the fuel injector pump or fuel pump? I am hoping that whatever it is is covered under the warranty.
As far as I know it will still run with a bad injector but there is no reason to rule out a bad CP3 or injector out at this point I would say. Both are covered up to 100k or Five years.
 

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Discussion Starter #7
okay, thanks. How about the fuel injector pump? I am not sure what your refering to with "CP3"? I cannot find out any info on what is covered with the 100k powertrain warranty either. Do you have any info on that by chance?
 

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okay, thanks. How about the fuel injector pump? I am not sure what your refering to with "CP3"? I cannot find out any info on what is covered with the 100k powertrain warranty either. Do you have any info on that by chance?
The duramax engines have a common rail fuel system which mean all the injectors are fed by a commom rail. The CP3 on a common rail is technically the injector pump. The cp3 is responsible for maintaining the rail pressure so if it failed there would be no fuel to the injectors. The engine has a five year 100k warrenty so if anything a happens to it GM will fix it as long as they don't see any signs of "abuse" such as a programmer.
 

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Ok...lets go back to what happened at the pump.

1: Did all the dash lights, DIC, Door Chime etc come on as normal..? ( you did mention only "battery" light - pls explain more deeply)
2: Did Engine turn over..?
3: Do you know when was the last time the Fuel filter was changed..?
4: Suggest you put up a Signature file: Yr, make,model, miles, mods etc on your vehicle..it will help all here to help you. ( look in the USERS CP for that)


If one and two are a go...then for sure it is lack of fuel to the rail or air entrained into the fuel stream. That can be caused by a number of things. Its too bad you dont have the truck with you to check. First thing I would likely have done is to check the bleed screw on the top of the fuel filter to see if it is loose..if it was, you might have gotten air into the system and no amount of cranking will start it...if it was tight, then I'd check to see if the filter itself was loose...ya never know.

Who knows if the previous owner started to use BioD..it has a tendancy to clean up the whole fuel system but in doing so will completely plug up the fuel filter.! its happened..lots.

Was your tank bone dry..in other words did you run it out of fuel..?? (ergo the previous question on Priming the pump)..the fuel filter head assy (where the filter screws onto - Passenger side of engine bay - near back wall), has a large "button" on it...push it down and you will manually feed fuel into the cp3. This is something that needs to be done when you change out your fuel filter...hopefully, something you do on a regular basis. When you change said filter, put new one on..then open bleed screw a bit to allow any air entrapped to escape -prime a bunch of times...when you hear/see fuel coming out of the bleed screw opening..tighten it down. Start motor. Drive away happy cause you bought a D'Max.!! :D

However if you were driving it and all was good...for it to die right there would lead me to think it was something else in the fuel delivery system...could be your cp3. Hmm now I'm curious to know if these trucks have a stock lift pump (brings the fuel from the tank to the cp3), or if those are strictly add-ons and it's the CP3 that pulls the fuel right from the tank to the injectors..? Anyone.?

Anyways, as you note, it's at the dealer. We 're waiting to hear what the issue was.

Be real curious to know.!!

stk
 

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Verrrrrry strange. I posted on this thread .. next day go to start truck, put into reverse to pull out of the driveway, get onto the street....and it dies.! Talk about weird.

opened hood, primed the manual filter pump and away I went...but could'nt help thinking about this thread.! Weird s hit that..!

stk
 

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BUG JUICER and
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I turned off the truck to refuel and when I went to start it it took a few attempts to start and then died as I put it in park.
Were you on "fumes" when you pulled in? My first guess is you ran out of fuel just as you pulled in. If you had a long screwdriver, you could have driven away.

90% of diesel stalls are fuel starvation.
 

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90% of diesel stalls are fuel starvation..
uHuh..! Am thinking that my fuel filter is not on as tight as it should be..stall happens only when I pull in "nose " first on my drive way...and only since I last changed my fuel filter...

..not tight enough. fix it in the am.!

stk
 

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uHuh..! Am thinking that my fuel filter is not on as tight as it should be..stall happens only when I pull in "nose " first on my drive way...and only since I last changed my fuel filter...

..not tight enough. fix it in the am.!

stk
I think the fuel filter being loose is pretty common. Seems to happen to alot of people eventually.
 

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TDG Mafia Goon
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I've done that one. I was about to go nuts trying to figure it out and while I was priming I tried to tighten more. first try + irritated = just right.
 

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'Ol Builder guy
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Just happened to me this spring. I rolled the fuel filter gasket and the truck stalled but would also run for a while, too. Finally I parked the truck, shut it off and it would not restart.

New fuel filter & gasket, primed pump and away I went.

Whenever a diesel dies on me, I always suspect air in the fuel system.

I would think when the OP bought the truck, the seller had probably just replaced the fuel filter and installed it incorrectly.
 

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To answer the fuel pump question. These trucks only have one fuel pump from the factory. Its the CP3 pump. Its located in the valley of the engine and driven off the cam. It sucks the fuel from the tank and provieds the pressure to the fuel rails.
 
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