Results 1 to 5 of 5

Thread: Changing the speedo on a 2012 2500?

  1. #1
    Tuner in Training BluBeaSSt's Avatar
    Join Date
    Dec 2011
    Posts
    48

    Changing the speedo on a 2012 2500?

    So this truck is confusing me, unlike the GM maps there is no tire change table. Do you use the VSS? Can't use the scanner like my Jeep either. Any help would be great!
    2002 Camaro SS
    2013 Jeep JK 2 Door

  2. #2
    Tuner in Training
    Join Date
    Dec 2018
    Location
    Fortuna, California
    Posts
    19
    If you changed tire size, you want to change the "VSS Tire Revs per"

  3. #3
    Tuner in Training BluBeaSSt's Avatar
    Join Date
    Dec 2011
    Posts
    48
    Quote Originally Posted by Wgluv2hunt View Post
    If you changed tire size, you want to change the "VSS Tire Revs per"
    Is there a calculation for that?
    2002 Camaro SS
    2013 Jeep JK 2 Door

  4. #4
    Tuner in Training
    Join Date
    Dec 2018
    Location
    Fortuna, California
    Posts
    19
    You can lookup how many revs per mile your tire size should be. You will need to make minor adjustments to get it exact.

  5. #5
    Changing the VSS does not correct the speedometer though. I'm not sure what the VSS does...
    2019 CCSB Bighorn - Excited HP Tuners finally supported Cummins CM2350&2450 platforms