They could also use the 3.5L I5 w/ Turbo, but the cost would be close to the V6. I had a 04 Colorado, CAI, Flowmaster EX, & TB spacer (totaled Feb/2011). It ran great, sounded nice, and could keep its own against other V6s and some V8s who could not drive. Also got 22MPG city and 27HWY towing a 1700LB load from GA to KS in the summer running AC.
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