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  1. 99 Suburban P0300 codes

    Chevy Suburban Forum (GMC Yukon XL)
    So a few days ago I went to start up my car and it was running about as good as a beached whale running a triathlon. So i used my code reader and got 2 P0300 codes which is random multiple misfire. I looked up the causes and parts that could fail (most of the parts on my engine are original) and...
  2. Misfire with battery light flashing

    Chevy Suburban Forum (GMC Yukon XL)
    Ok I've got a 04 Z71 Suburban 3.5 inch lift 20" Motos you know the basic Southern Man's vehicle so I got to noticing after 2-3 days of not cranking the trucks battery would be dead so figured well fixing to be time to get a battery so we t got a huge gold top had to make it fit lol ok about idk...
  3. Need help!! 2001 Yukon xl Denali 6.0 p0300 code

    Chevy Suburban Forum (GMC Yukon XL)
    Hey all, going to throw this out there out of desperation. I can tinker on vehicles but I am not a mechanic by any means. Getting the p0300 code for random miss. I have replaced all plugs, wires, and coils before figuring out this code is misfire on random cylinders, so probably fuel or an air...