Play Now. Pay Later. Safe. Easy. Affordable.

2017-2019 GMC/Chevy L5P Duramax 6.6L TCM Tuning | HP Tuners

From: $374.99

Optimize shift points, line pressure, converter lockup, increase efficiency, and utilize adaptive shifting.

HPTuners Modified ECMs & TCMs are currently on backorder. We expect to receive them in small quantities and will ship out accordingly.

This tuning package can only be installed using the HP Tuners RTD or MPVI2.

PPEI is making great strides in expanding the performance of on-highway vehicles and only offers emissions compliant tuning.

Modified L5P TCM

A modified HP Tuners L5P T87A TCM is required to flash your TCM. Select this option if you do not have a modified TCM. A $150 Refundable Core Charge is included in the listed price.

Flashing Credits

4 Credits are required to flash your TCM with the RTD. Please select this option if you do not have credits.

SKU: T-1719DT-HPT Categories: , Tag: Compatible Years: 2017, 2018, 2019 Compatible Model/Engine: GMC/Chevy L5P Duramax


Modified L5P TCM

Weight 2 lbs

Flashing Credits


There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.

Redefining The Limits


Years Tuning


Vehicles Tuned

2 Million+

HP Gained


Dyno Tests