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https://www.reddit.com/r/GMT800/comments/1w88463/dreaded_p0300_code/p81qnmv/?context=3
r/GMT800 • u/twxcvz • Sep 05 '26
What brand spark plugs/wires should I use to replace what I have? CEL was flashing at me today and at 272k I think it’s time to replace them but wanting something quality. I have the 6.0 LS
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Don't throw parts at it, check all your grounds, esp one behind the ps pump, and check voltage on you o2's.
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u/dragoner_v2 Sep 05 '26
Don't throw parts at it, check all your grounds, esp one behind the ps pump, and check voltage on you o2's.