Question about 2004 GMC Sierra 2500

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Injector 2 on 2004 GMC Duramax diesel. Electrical problem. Where is cylinder 2 ? What is the likely cause? Is there a common problem

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Get an injector tester and put it on every injector to find the one that is not firing.

Posted on Jul 12, 2010

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Suddendly start running rough and worser on overdrive. Iused scanner it showed p205,p2609and p2149.Please tell me what to do.


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2006 GMC 4500 Diesel Truck - code P0039..At random intervals the engine will drop to idle and CEL illuminates. The throttle will not operate. what sensors I should replace and it what order? Thanks


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Chevy duramax code p0087


P0087 GMC - Fuel Rail Pressure Malfunction Pressure Too Low

Possible causes - Faulty fuel pump
- Blocked fuel filter
- Faulty fuel pressure sensor
- Fuel pressure sensor harness is open or shorted
- Fuel pressure sensor electrical circuit poor connection
- Faulty Fuel injector

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1 Answer

Duramax diesel


most likely a bad injector, you need to check balance rates for the injectors with a scanner. if the rates are farly equal then it is probably a rod bearing but injectors are a common problem that's why they changed the original LB7 duramax(2000-2004) from internal injectors to external so they would be easyer to change.

Nov 21, 2013 | Cars & Trucks

1 Answer

Fuel in engine base oil


I'm not much on diesels, but for gas engines the most common source is a leaking injector or fuel pressure regulator.

Jul 01, 2013 | 2001 Chevrolet Silverado 2500HD

1 Answer

Excessive black exhaust on 2003 GMC Sierra Duramax Diesel.


This is what i would try (cheapest first) redexe/wyyns
injector cleaner,double dose,then i have put 1gal gas in 10gal diesel to increase burn temp (you may encounter a hot start problem temporarilly)then if still smoking, get a compresion check on the engine(this will tell you volumes)
by the way the NATO tanks put in 1/3 gas in diesel to stop it freezing in arctic conditions.any more than 1/3 can result in problems.

Mar 17, 2010 | 2003 GMC Sierra

1 Answer

2002 2500hd 6.6 duramax diesel is blowing smoke and has loss of power. Is this the injectors or piston rings?


Bulletin No.: 03-06-02-005B
Date: November 18, 2004
TECHNICAL
Subject:
Engine Coolant Loss with No Visible Leaks (Reseal Injector Sleeve)

Some owners may comment on engine coolant loss with no visible leaks. Excessive white smoke or a coolant type odor coming from the exhaust pipe, along with low coolant levels, may indicate coolant in the combustion chamber.
Cause
Condition may be caused by engine coolant entering the cylinder due to a dirty or damaged seal between the fuel injector sleeve and the cylinder head.

If it's black smoke, you could have a faulty or dirty EGR valve and may not be closing 100%. Remove the EGR valve and clean it with spraying carb cleaner and reinstall after inspecting the valve can move without any binding. Goo luck and hope this helps.

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3 Answers

2002 2500HD duramax


If it is A Diesel Engine It it Probably Over Fueling Due to A Misfire In 1 or more Cylinder or A Bad Injector Leaking into Cylinder

Feb 12, 2009 | 2002 Chevrolet Silverado 2500HD

1 Answer

2002 duramax will heat up underload but not at idle any ideas why


No diesel I have ever owned will heat up to operating temp while idling. I have had semi's and dump truck and a Dodge with a Cummings turbo diesel. If you don't idle a diesel up to around 1200 rpm while sitting the combustion chamber temperature will drop because the diesel does not ignite fully at low rpm. You may also notice after an extended period of idling 1/2 hour or more that when you pull away the exhaust will be whitish blue because of the unburnt diesel fuel sitting on top of the rings. Also extended low idle will wash down the cylinder walls with unburnt diesel and remove the oil from lubricating the cylinders and rings. Hope this helps you understand why your diesel won't heat up while idling. Mike

Jan 06, 2009 | 2002 GMC Sierra

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