#p0300

  1. Z

    P0300 code on 2004 GMC Yukon XL Denali - 119,000 miles

    2004 GMC Yukon XL Denali - 119,000 miles Have had a P0300 code for a while now. Changed everything from spark plugs to lifters, cleaned as much dirt and carbon off the engine, but I still get the same code. After driving for a while, there is a noticeable shake / vibration at idle. Also, all of...
  2. 2015TahoePPV

    Heads up! P216E, P0300, P0324 all related (New Engine install, New Injector Install)

    Here's a good one for you. I'm in the home stretch on installing a reman (AFM Deleted) 5.3 in my '15 PPV. My son the gym rat bent the RH fuel rail removing it from the old engine, so we replaced it. We also replaced all 8 injectors with new OEM. Removing the fuel rails/ injectors from a 200K...
  3. laredo1307

    96 Tahoe Random Misfire P0300

    Hello Gentlemen, I'm at a loss on trying to find the source of my misfire. The strange thing is it only happens when I fire it up in the mornings and will last my whole commute to work, which is about 30miles. It only throws a P0300 code and something is definitely telling it to dump too much...
  4. A

    P0300 random misfire

    Hello. I am having issues with a 2005 Tahoe 5.3. The truck starts and runs fine for a few minutes and then out of the blue it will throw p0300 and randomly misfire. The truck will misfire for a few minutes and then run perfectly fine after. If I watch the misfires I’m live data when this occurs...
  5. M

    07 yukon 5.3l flex p0300 after lots of money spent.

    I have an 07 yukon 5.3l flex fuel with 195,000 miles. I know the P0300 code has been addressed a lot but mine may take the cake and I’m lost. I spend $4800 to have lifters replaced by certified mechanics. Heads were milled and the repair was done correctly. I had 2 lifters go bad and had...
  6. RayRaysJukeJoint

    2015 6.2 misfire on #8 Help please.

    I have a 2015 yukon xl with the 6.2. It started misfiring on 8 and so far I have done the following. 1. New Plugs 2. New Plug Wires 3. New Injectors Still, the misfire is there. I get the P0300 and then the P0308 code and I am at a loss as to what to try next. Oh and I swapped the coil out...

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