GM T87 + T87A TCM service
Cloning, unlocking and programming for GM's T87 and T87A transmission control modules, used with many 6-, 8- and 10-speed automatics in GM trucks, SUVs and performance cars.
What we do
- Clone: copy your original TCM to a replacement so it bolts in and shifts like the original
- Unlock: open the TCM so your tuner can adjust shift points and torque management
- Program: software updates and setup for a replacement unit
- Read + backup: a full saved copy before any change
Good to know
Unlocking the TCM is not a tune. We unlock it and send it back; your tuner keeps the calibration. If you're replacing a failed TCM, send the original along with the replacement so we can clone it.
Unlocks start at $199 and clones at $299. The unlock vendor fee is included in your quote.
- Price confirmed before you ship
- Original data saved before any work
- Tracked return shipping
- 90-day workmanship warranty
Common questions
Do I need to send the whole valve body?
No. Send the TCM module only, unless we tell you otherwise when we confirm your order.
Will a used T87 TCM work in my truck?
Usually, once it is cloned from your original or programmed to your vehicle. Send the part numbers when you start your order and we'll confirm before you ship.
How do I know which TCM I have?
Look for the part number on the module's label, or send us your VIN and we'll help you identify it.
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Ready to ship it?
Start an order online. We confirm your price and send your job number within one business day.