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04-05 Colorado vs. 06 and Up

Discussion in 'General Chevy & GM Tech Questions' started by JOnNyAZ, Aug 17, 2008.

  1. JOnNyAZ

    JOnNyAZ New Member

    Just curious if anyone knows what modifications were made to the I5 colorado after 05 to kick it up from 220HP to 242HP.... thanks.
  2. retired2001

    retired2001 Epic Member 5+ Years 5000 Posts

    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!

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