Question about 2003 Chevrolet Silverado 2500HD

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2003 Duramax Diesel loosing prime and will not start until I lift the hood and pump the prime plunger on the fuel filter housing.

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Duramax diesel trucks do not have a lift pump. start with the simple things make sure your fuel filter is tight and check the shreader vlave on the fuel rail if that don't help check the filter housing for a leaks arround the heater element or a crack in the housing itself

Posted on May 11, 2010

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Replace the fuel supply pump.

Posted on Apr 25, 2010

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Mine is doing same thing but only when it is hot out. Did this last summer went away and now this summer again. Any thoughts

Posted on Jul 31, 2011

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2 Answers

2500hd fuel pump


check your lift pump it sounds like an intermittent fault related to electrical harness and or a relay going bad also check for technical service bulletins at your local dealer they might have more specific information GOOD LUCK

Apr 07, 2017 | Cars & Trucks

1 Answer

2005 Duramax stopped running.replaced fuel filter and sensor,no luck cam you help.


After replacing the fuel filter did you prime the system? There should be a small circular pump on top of the filter assembly to prime it. I own a 2003 Duramax and it usually takes about 5 pumps / turn over / 5 more pumps / turn over / and 5 more and you should get it started. It will take longer if you didn't fill the fuel filter with diesel before installing it as well. Let me know. Thanks.

Sep 11, 2012 | Cars & Trucks

1 Answer

Changed the oil and fuel filters in 06 duramax and truck won't start


IS THE ENGINE TURNING OVER? IF IT IS YOU MAY HAVE TO BLEED AIR FROM THE FUEL SYSTEM, IF THERE IS A MANUAL PRIMING PUMP, USALY BUILT AS PART OF THE FILTER HOUSING OR REMOTELY MOUNTED ON THE FUEL SYSTEM PUMP THE PLUNGER THILL IT GETS HARD THERE SHOULD BE A BLEED SCREW MOUNTED OPEN IT AND STROKE PLUNGER UNTIL YOU SEE BUBBLE FREE FUEL COMING THROUGH CLOSE OFF THE BLEED SCREW AND PUMP PLUNGER TILL HARD AGAIN THEN TRY STARTING

Jul 29, 2011 | Chevrolet 2500 Cars & Trucks

1 Answer

2003 Chevy Duramax 2500 HD with a vapor lock when temp is moderately hot; will not start without using prime pump on top of fuel filter housing - sometimes with low fuel level will not re-start even with...


Most likly the filter housing needs to be replaced and or the fule lines to and rom the housing. the housing has the plunger on top and the filter screwed under. The plunger goes bad on these and causes air to enter and then become air locked. this is also very comon on the IPR with the fuel filter housing mounted behind cab on frame rail driver side. road sault gets to these and degrades the unit untill it sucks air. On the c 4500 you need to get the oem fuel lines because of the tight space restrictions to route the lines. the OEM lines are molded to make the tight bends required.

Hope this helps... Good luck

May 26, 2011 | 2003 Chevrolet Silverado 2500HD

2 Answers

No start on duramax at time when hot


IF THIS IS AN 2007 YEAR THE FUEL PUMP SHOULD BE IN THE TANK. IF THIS IS A DEISEL THE PUMP COULD BE ON THE FRAME RAIL BUT ONLY HAS ONE PUMP THE PUMP RUNS BOTH TANKS.
CHECK FOR ANY CRACKS IN THE FUEL LINE ALSO. BUT IT SOUNDS LIKE THE FUEL DRAINS BACK INTO THE TANK WHEN IT SETS THIS IS A SIGN THAT THE FUEL PUMP IS NOT HOLDING IT'S PRIME AND THIS NEEDS TO BE REPLACED

Sep 05, 2009 | 2006 Chevrolet Silverado 3500

1 Answer

2001, Duramax Deisel 6.6 won't "restart"


fuel pump is obviouslynot working !
check it & its wiring!!!!!

Jul 20, 2009 | 2003 Chevrolet Silverado 2500HD

1 Answer

Engine needs priming every time I want to start it.


wow could be afeul pump going bad or dirty filter injectors but im not sure i know gasoline cars

Jun 24, 2009 | 1986 Mitsubishi Montero

2 Answers

We have a 2003 GMC Sierra duramax diesel truck We took it into the shop last week because it would not start. They told us that the fuel filter was sucking air and changed it. The truck then ran fine for...


i have a 2003 , 2500HD Duramax with 223000km . I was way up in the north country when this started to happen to my truck. I found an old mech. who had to come back into the bush to give a boost because i couldn't start my truck as well. He told me he has seen this before on the 03's. Long story short it was the injectors the dealer replaced all 8 under warrenty. GM sent me a letter later saying they will cover all diesel parts under warrenty for 320,000km and another 6yrs. its your injectors change your oil more often until you get it fixed. To check this park your truck for the day and try starting it if it will not start. Go under the hood and prime the fuel filter (pump until it gets hard) then turn the truck over a little and prime the filter again until hard then start the truck. if this works then get the injectors replaced by GM. This worked for my truck hope it helps. Rick

Mar 07, 2009 | 2003 GMC Sierra

1 Answer

Priming fuel system on a 8.1L diesel engine 2001chev 1 ton dual


Well, one problem is, if its an 8.1, its not a diesel. The 8.1, or Vortec 8100, is a gas engine. The DuraMax is a 6.6 engine. There is usually not a priming system on a gas engine, because the fuel pumps will usually get it through the smaller filters used quick enough you dont need them. However, if it is a DuraMax engine, then right on top of the fitting where you mount your diesel filter, there is a primer pump and an air bleed valve. What you do is, open up that air bleed valve ( its a little black plastic octagon shaped thing on the top of the filter mount) then you pump the primer (the silver button looking thing) until you get diesel squiting out the air vent without too many air bubbles or gurgles.

Jan 17, 2009 | 2001 Chevrolet Silverado 2500HD

2 Answers

2003 GMC Duramax Diesel won't start


I see that you had the injectors replaced 20,000 miles ago. I would still check the oil to make sure it is not overfull. The new injectors could be bad. If the oil level is not overfull then get a paper towel and touch the dip stick tip on the paper towel while oil is on the dip stick. If it's only oil it will not spread. If it has diesel in the oil the oil with spread. If this test doesn't show the injectors to be bad then you have three other possibilities. The FICM (fuel injection control module), the fuel pressure regulator, or the injection pump. It's hard to pinpoint what the problem is without running more tests and the only way to run those tests is with the computer the dealership has. Just so you know your injectors are still under warranty until 100,000 miles. Most likely you will have to take it to the dealership to get you truck fixed. I hope this helps you some.

Jan 05, 2009 | 2003 GMC Sierra

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