Question about GMC Sierra 1500

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Im trouble shooting my 2002 GMC Sierra. I installed a Vortec supercharger around 2006. I am losing about a quart and a half of oil a week (no bad visual leaks) through the exhaust I think. Check engine light steady and blinking. Diagnostic code mentions 4 things mostly revolving around O2 sensors. Truck is skipping etc... Checked and cleaned O2 sensors. No oil in the intake. where is the pcv valve? And any other advice?

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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  • 176 Answers

SOURCE: O2 check engine light

I have a 1999 Silverado K1500 that started doing the same thing....the codes told me nothing...another wrench told me I needed a $900 head gasket repair, another told me I needed a $290 Injector replacement........what I had forgotten was that I ran a can of HEET through my tank..when that gas was gone so was the problem.

Hope this helps

Posted on Jan 03, 2009

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keithheavili
  • 410 Answers

SOURCE: Engine will not idle, stalls at stop lights etc - EGR code

To me if the engine will not idel and stall once you have stopped, that points to an IAC (Idle Air Control sensor) which is located on your throttle body.  The part is very easy to get to and changes out pretty quickly.  Hope this helps.  Thanks for an honest rating and for using FixYa!

Posted on May 20, 2009

  • 25 Answers

SOURCE: I own a 2002 Chevy Trailblazer with 4200 vortec

Do you know if the plugs were changed, a bad or broken plug will also cause rough idle and slow acceleration?

Posted on Oct 21, 2009

  • 972 Answers

SOURCE: 2002 GMC Z-71 Check Engine Light codes????

maf or vac circuit low
purge/vac vent valve malfuntion
if your purge valve were stuck open it would cause a rich condition because it would constantly be sucking gas fumes from the tank. repair the evap. purge system first then go on to the other code
the purge solonoid is connected to the evap canister it cycles on and off the rapidly to remove gas vapor from the fuel tank system. it is usually near a plasitic tee fitting with a green cap on one of the legs off the tee. when the engine is warmed up it should make a audible tick tick tick sound.sometimes a piece of the carbon breaks loose from the carbon canister and blocks open the purge valve.if carbon in valve replace canister and clean/replace purge valve.

Posted on Mar 30, 2010

  • 21 Answers

SOURCE: Engine light code 44 1994 GMC Sierra Pickup HD 5.7l, 4wd.

look for a serious exhaust or intake leak. look for bad wires to the o2 sensor or map sensor. just for starters.

Posted on Jul 20, 2010

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