Results 1 to 3 of 3

Thread: HHR TCM replacement

  1. #1
    Potential Tuner
    Join Date
    May 2021
    Posts
    2

    HHR TCM replacement

    Can i swap a TCM from a different vehicle and use HP VCM to flash it? The vehicle is a 2006 HHR with a 2.4L with a 4t45E transminssion.

  2. #2
    Senior Tuner TheMechanic's Avatar
    Join Date
    Jan 2014
    Location
    SoCal
    Posts
    1,533
    No. You will need GM SPS and a MDI 1/2 to do the initial programming and setup. Then you can use HPT to modify that factory software.

  3. #3
    Tuning Addict blindsquirrel's Avatar
    Join Date
    Apr 2017
    Location
    Meridian MS
    Posts
    7,451
    If it's new and totally blank, I believe you will need GM tools to do the first write. But yes, you can change the OS on a T42 TCM with HP Tuners.