Question about 2005 GMC Sierra 2500HD 4WD

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2005 duramax diesel knocks at idle and has low power, it doesn't smoke funny, doesn't have bad pressures or fluids, starts up fine sounds ok for a second or two but after that it sounds like a bag of **** and is hard to rev up.

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 114 Answers

SOURCE: 2002 gmc yukon, rich fuel code, low fuel pressure @40

you may have two oxugen sensors on your yukon. if so the oxygen sensor that controls that bank may be bad. from what you mentioned in your complaint, it sounds like it is the oxygen sensor.

Posted on Dec 24, 2008

  • 1 Answer

SOURCE: Duramax Shuts off at 1000 rpms

I had the same problem and it ended up being the EGR Valve that was sticking.

Posted on Apr 28, 2009

Molson02536
  • 3854 Answers

SOURCE: 2002 2500hd 6.6 duramax diesel is blowing smoke

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.

Posted on Jun 25, 2009

  • 1 Answer

SOURCE: Diesel smoking and lack of power

on my sorento same problem and its solved vacuum pump on turbo, now ok, sorry for bad english, vacuum membrane is broken

Posted on Aug 13, 2009

  • 400 Answers

SOURCE: having problems starting my 2002 duramax diesel

Sounds like the injectors have given up. Depending on the purchase date and milage gm has extended the warrenty on the injectors. You will need to call a local dealer and see if you truck may be under warrenty. Also if you have and power adders you must remove them. Having power adders will kill you warrenty.

Posted on Oct 13, 2009

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