Question about 2008 GMC Sierra 1500

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Hi...2008 gmc sierra crew...check engine light came on thought maybe was standard just before hitting 30,000 then noticed low oil pressure ( 20 ) then noticed clacking noise?

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  • headnorth208 May 10, 2010

    Hi....update on low oil pressure 08 sierra issue....found out pump, etc. are fine and no leaks. When I had it checked found out 3.5 quarts low on oil since last oil change in March. So rapid oil consumption in the last couple of weeks?? Took it to the shop this morning locally for them to dig in as I was out of town and patched it with extra oil to get home.

  • headnorth208 May 10, 2010

    update....thought the oil pump was out and had it towed while out of town. They plugged it in and the pump, etc are fine so patched it with 3.5 quarts of oil to get home and having it checked out locally. No leaks so it is burning the oil in the engine somehow...but 3.5 quarts in a couple thousand miles or less if problem just developed? While gasing up guy with a 2010 silverado pulled up next to me and asked how I liked it...asked me if mine was an '08 and said he had an '08 that they never could figure out why he was burning a quart plus between oil changes. **********just got off phone with dealer...evidently gm will be issuing a new bulletin in a month or two with a fix but they have not been notified exactly what the problem is. Should be interesting...



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Sounds like an oil pressure problem. The clacking sound is most likely the lifters are collapsing due to loss of oil pressure. You may have a failing oil pump.

Posted on May 08, 2010


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I have a 1991 gmc sierra and my oil pressure is dropping down to zero and it has began to knock it was not knocking or anything until i noticed my brake light was flashing now i reset the computer but

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I just bought a 2002 GMC 1500HD Crew Cab with 223,000 miles. The truck looks and runs like brand new. They were all freeway miles. The problem is this. When it first starts the oil pressure gauge is in the...

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Is this after recent oil change.Sound like you have the wrong viscosity of oil.

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