Delco T87A TCU Tuning
Transmission controller used in 15 supported models from 4 makes.
Buick with the Delco T87A
All Buick tunes- Buick Enclave2018+2.5 Turbo, 3.6 V6AutoTuner
Cadillac with the Delco T87A
All Cadillac tunes- Cadillac ATS2012+V · 3.6 V6, 3.6T V6 (LF4)AutoTuner
- Cadillac CTS2007+3.6 V6AutoTuner
- Cadillac XT52016+3.6 V6AutoTuner
- Cadillac XT62019+3.6 V6AutoTuner
Chevrolet with the Delco T87A
All Chevrolet tunes- Chevrolet Blazer2019+3.6 V6AutoTuner
- Chevrolet Camaro2011+3.6 V6AutoTuner
- Chevrolet Colorado2012+RG · 3.6 V6AutoTuner
- Chevrolet Corvette2009+C7 ZR1, ZR1 · 6.2 V8, 6.2i V8 SC (LT5)AutoTuner
- Chevrolet Express2018+4.3i V6AutoTuner
- Chevrolet Silverado2013+GMT K2XX, GMT K2XX - FL · 4.3i V6, 6.6 Duramax (L5P)AutoTuner
GMC with the Delco T87A
All GMC tunes- GMC Acadia2017+3.6 V6AutoTuner
- GMC Canyon2013+3.6 V6AutoTuner
- GMC Savana2018+4.3i V6AutoTuner
- GMC Sierra2014+4.3i V6, 6.6 Duramax (L5P)AutoTuner
About Delco T87A tuning
The Delco T87A transmission control unit is supported in 15 models from Buick, Cadillac, Chevrolet, GMC. We read, modify, and flash it with AutoTuner, then verify the result on our Dynojet 424xLC2 in Jenison, MI. Transmission tuning sharpens shift timing, firmness, and torque limits to match your power.
Don't See Your Vehicle?
These lists cover off-the-shelf tuning platforms. We also do standalone ECU installs and custom calibrations, so reach out and we'll tell you what's possible for your build. Compatibility data last updated 2026-09-24.