T87A & T93 TCM Unlock Service | GM 8 & 10-Speed TCMs

Unlock the full potential of your GM transmission with Black Bear Performance’s professional T87A and T93 TCM Unlock Service, engineered specifically for EFILive tuning.

Many late-model Chevrolet, GMC, and Cadillac vehicles have factory-locked T87A and T93 Transmission Control Modules that restrict access to critical transmission parameters. Our specialized unlock service permanently removes these limitations, giving you complete write access through EFILive. 

Our mail-in T87A and T93 TCM unlock service allows you to retain your original transmission control module while preparing it for custom transmission tuning.

What You Get:

• Full EFILive compatibility for custom transmission tuning
• Ability to optimize shift firmness, timing, and converter lockup strategies
  
• Support for both T87A (common on 2017–2019 8-speed applications) and T93 (2019+ 8/10-speed non-Global B applications)

Simply remove your TCM, ship it to us, and we’ll handle the rest with fast, careful processing. Once unlocked, pair it with your EFILive FlashScan or AutoCal interface to take full control of your transmission calibration. Please contact us for our mail-in form to include with your TCM.