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  1. I4/I5 Engine & Drivetrain
    So at 68,000 miles my 2005 Colorado (crew cab 4x4 3.5L Z85) threw me a P0302 code. I've been waiting for it. Idle has been rough for a while, MPG down from 20 hwy to 17 hwy, so yeah, seen it coming. Haven't done a compression or leakdown test yet, but I am planning for the worst anyway. But I'm...
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