2004 G3500 Box Truck CEL

[rpaoness]

Set the random cylinder misfire again idling it to roll off the ramps. I wonder if it’s something about very low speed high low that somehow makes it skip. Not something I felt, but I’m not that observant. Reset and we’ll see how soon it returns. At 274k miles and 3k miles a year it’s probably not worth chasing until it gets more frequent. 6k on plugs. Could try coils or injectors, or ignore.