GM 6L80 / 6L90 transmission tune
2006–2019 Silverado, Sierra, Tahoe, Yukon, Escalade; Camaro, G8
What we change on this platform
Shift time and pressure for the lazy 1-2 and 2-3. Part-throttle shift points raised so it stops hunting between 5th and 6th at 45 mph. Converter apply and release speeds set per gear, with full-pressure lockup. Torque management trimmed at light throttle so the shift doesn't go soft right when you want it.
What your truck needs first
By model year, from HP Tuners' current support list. This is the owner's side of the job — interface, licensing credits, and any one-time module upgrade.
| Model years | Module | Status | Interface | Credits |
|---|---|---|---|---|
| 2006–2014 | T42 / T43 TCM | Ready to tune Straight OBD read and write. | MPVI2 or newer | TCM licenses free (T43) |
| 2015–2016 (HD 6L90) | T87 TCM | Ready to tune No service. | MPVI2 or newer | 4 |
| 2017–2019 | T87A TCM | Ready to tune As of Nov 2025 the T87A no longer needs HP Tuners' unlock service — read and write over OBD. | MPVI2 or newer | 4 |
What you send us
- A fresh read of the vehicle saved as a .hpt file, from a module that's already upgraded if yours needs it
- Your mod list, if anything's been changed: converter, gears, tires, lift, built unit
Price
$179 for the Transmission Tune, $249 with the driveability package. One business hour turnaround, one revision included.
Order the GM 6L80 / 6L90 tune