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T87A Installation
If you have purchased the TCM for a 2017+ Chevrolet Silverado/GMC Sierra 6.6L Duramax (L5P), please install the TCM at this time. There are no additional steps to be completed.

If you purchased the TCM for ANY vehicle besides a 2017+ Chevrolet Silverado/GMC Sierra 6.6L Duramax (L5P), please read the following steps before installing your new TCM:

Step 1: Download and install the latest VCM Suite 4.3 Beta available at www.hptuners.com/downloads

Step 2: Perform the “Replace TCM” special function in VCM Scanner
       
       1) Connect VCM Scanner to the vehicle with the stock TCM installed
             a. Go to “Vehicle Controls & Special Functions”
             b. Click “Replace TCM” to start the function (located under System -> General)
             c. Follow the prompts to complete the Replace TCM process for the stock TCM
     
       2) When prompted, replace the stock TCM with the HP Tuners unlocked one
       
       3) Connect VCM Scanner to the vehicle with the unlocked TCM installed
            a. Go to “Vehicle Controls & Special Functions”
            b. Click “Replace TCM” to start the function (located under System -> General)
            c. Follow the prompts to complete the Replace TCM process for the unlocked TCM
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