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    2009 Denali 6.2 misfire detonation

    Thanks for that very informative reply. My Snap On guy suggested many of the same things to look at. I inspected most of the wiring associated with the cmp sensor. There is a slight oil leak near the area (looks like coming from cooler lines) which is seeping on the wiring area. One thing...
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    2009 Denali 6.2 misfire detonation

    New member first post,hopefully I can be steered in the right direction. 4 weeks ago my wife’s truck started missing and detonating pretty severely. It took a while to kick codes but eventually p341 and p340 came up. I replaced the cmp sensor with a borg Warner brand and the truck was fine...

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