Question about 2005 GMC Sierra

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2005 GMC Seirra 4.8l excessive oil consumption.

My seirra using a quart every month. I have seen smoke at start up once or twice, but not all the time. I don't see any leaks.

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  • outcold52 Feb 26, 2009

    It is about 1500 to 2500 miles a month. It doesnt make it to required oil change.
    I also have an evap code 448 small leak. I had the tighten gas cap light come on. i replaced the gas cap when tightening did nothing. I crawled under the truck and check all the hoses with my hands and notice no breaks. Any pointers on that?
    I have a small noise in the truck that baffles me.... it sounds like a horn sometimes when i take off or accelerate from slow speeds.



  • yadayada
    yadayada May 11, 2010

    1500-2000 miles per quart is not excessive oil useage, all engines burn some oil, 1 quart in less than 500 miles is an issue.

  • yadayada
    yadayada May 11, 2010

    how many miles to a quart?

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U might have recall its only 05 .that sucks .sounds like someone drove it with low oil.u need overhaul.hate to hear this.

Posted on Jan 25, 2013

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This is not a very good sign really. if you rev up to about 4-5 thusand rpm (more than usual) while driving in a safe mannor of course and see smoke then you will find the piston rings are probably going. you might al;so want to take into consideration that your valve stem oil seals are all internal as well so no real sign of leakage.so could also be the culprit.

Posted on Feb 25, 2009

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