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  1. #1
    Jr. Apprentice JOnNyAZ's Avatar
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    Jul 2008
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    Fort Knox, KY
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    15

    Default 04-05 Colorado vs. 06 and Up

    Just curious if anyone knows what modifications were made to the I5 colorado after 05 to kick it up from 220HP to 242HP.... thanks.
    JOnNyAZ :great:
    05 Chevy Colorado Z71

  2. #2

    Default

    From what I know, they upped the displacement from 3500 cc to 3700 cc. I imagine it was enlarging the bore. The four went up accordingly. They may have made some CPU changes, too. Good luck!


    2010 Z/71 Colorado C/C
    Black 4X4 w/5.3L V8
    ===============
    2007 Winnebago Adventurer
    w/8.1L Chevy & Allison 6spd.
    Canyon Lake, Texas

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