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speedo calibration with tire change

Discussion in 'Chevy Trucks' started by jay723, Dec 13, 2006.

  1. jay723

    jay723 Member
    from SE CT
    Messages: 30

    Does the computer need to be changed for a different tire size, or is it read through the ABS sensor? I went from 245's to 265's. Thanks for the help.
     
  2. Yaz

    Yaz PlowSite.com Addict
    from NH
    Messages: 1,061


    Having 245's I'll go out on a limb and say you have a newer 99-07 2500HD GM truck. If so you can leave it alone as long as all 4 are the same size and having only a 1 size jump you will be fine.

    Your speedometer and odometer may be off by 4 % at my guess. 245 to 285's were a 8% difference on my truck.

    A few ECM type programmers and the dealer using a Tech II can change tire size if you want, but I wouldn't bother.
     
  3. yzf1000_rider

    yzf1000_rider Senior Member
    Messages: 147

    click here to see what your speedo is acutaly reading.
     
  4. yzf1000_rider

    yzf1000_rider Senior Member
    Messages: 147

  5. Yaz

    Yaz PlowSite.com Addict
    from NH
    Messages: 1,061

    I like that.. very cool

    Thanks