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Posted
2 hours ago, 2015 sierra said:

2015 GMC Sierra  2003000 miles  should I replace all the coil packs it still has the original coil pack .?

do they become less affiant over time ?

Well at over 2 million miles on a 7 year old truck, I'm guessing there's quite a few things besides the coils that are due for replacement...🤣

Posted

If they work, don't replace them. Can't count how many trucks I've see with over 250,000 miles on the stock coil packs.

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  • 2 months later...

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