My first night home with my truck some jackarse broke my window and all he got was a pack of smokes, next day I installed a Viper 2way alarm w/ remote start. I was gonna do it anyway but that fool rushed me into it.
This informative thread, has answered my question on spark plugs and I just wanted to say thanks to you guys. I just purchased 04 Denali, am stock w/ no mods and wanted to tune it up its at 109k.
Looks like im going with stock replacements Ac Delco.
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