Question about Chevrolet Silverado 2500HD

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I was driving home on the freeway and notice the engine was running rough and loss of power, after driving some time the condition got worse. Then when stumble badly a puff of white smoke appeared and the engine started the run normally. The fuel filter was replaced last month.

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  • GKRUEGER May 10, 2010

    The white smoke came from the tailpipe.

  • GKRUEGER May 10, 2010

    I should add the the truck in question is a 2006 2500 HD Duramax diesel engine.



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Where did the white smoke appear?
under the hood or the tailpipe?

Posted on May 10, 2010

  • Sean Reisdorf
    Sean Reisdorf May 10, 2010

    well then you are getting water ingestion into the engine
    common concerns for your vehicle is either head gasket issues or leaking coolant passage through the intake

    to diagnose you should first do a compression test and/or a head gasket test
    for the latter you will need a special tester

    however, any good shop will be able to do the diagnose for under $100 which might be cheaper than buying the tools to test it yourself

  • Sean Reisdorf
    Sean Reisdorf May 10, 2010

    makes a difference but still could be previous concerns too

    If excessive smoke is present, inspect for a stuck open fuel injector by performing the following procedure:

    Remove the ignition 1 relay.
    Remove the glow plugs. Refer to Glow Plug Replacement - Bank 1 and Glow Plug Replacement - Bank 2 .

    Do not stand in front of the glow plug holes while cranking the engine.

    Crank the engine while observing the glow plug holes for fuel spray.
    Replace the fuel injectors for the cylinders that spray fuel.
    Inspect for contaminated oil or high oil level.

    If the engine control module (ECM) glow plug control module (GPCM) or a fuel injector has recently been replaced, it may be necessary to confirm the fuel injector flow rate values.

    Inspect the fuel injectors. Refer to Fuel Injector Balance Test with Tech 2 (Manual Transmission) or Fuel Injector Balance Test with Tech 2 (Automatic Transmission). this is the GM scanner but any professional scanner will do



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