Pay in 4 interest-free payments of $81.25 Learn more
Ships within 48 hours · Estimated delivery Jul 27 - Aug 1
Full Package: Includes Valve Cover to Catch Can Lines
✅ Enhanced Lifters Protection – Supports factory lifters
we offer the E41 Upgrade Cable for rent:
CORE CHARGE REFUNDS ARE ISSUED ONCE YOUR CORE IS RECEIVED AND INSPECTED IN ACCORDANCE WITH THE CORE RETURN POLICY PROVIDED VIA EMAIL AFTER PURCHASE
Exhaust Choice
2017-2019 Duramax L5P T87A Transmission Tuning Package Duramax L5P Hard Parts Full Package: Includes Valve CoverWhats Included Transmission Tuning Configuration Four (4) HPTuners Universal CreditsRequired for TCM unlocking and flashing. As of November 18, 2025, HP Tuners has officially released direct OBDII flashing support for the GM T87A Transmission Control Module (TCM), eliminating the need to remove, ship, or exchange of the TCM unlocking