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HP Tuners GM T46 TCM Service (Global B) C8 Corvette (2020+)

SKU: HPTTCM-GB-T46-U
Price
$499.99
Currently Backordered - You can still place your order and we'll ship your order as soon as the product is back in stock!

Shipping address for send-in services: HP Tuners, LLC ATT: GM T46 TCM Service (Global B) 711 Dartmouth Lane Buffalo Grove, IL 60089 Please allow up to 10 business days (plus shipping times) per ECM/TCM for processing once your module arrives at our location for service. (i.e., 2 ECMs = up to 20 business days). This estimate does not include return shipping time. After purchasing this service, please fill out the shipping form below and place it inside your shipping box. Please also write your order number on the outside of the shipping box where it is visible.

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Installation Services

Don’t worry about the hassle — let our expert team at Forza Motorworks handle the installation for you. Our professional installation ensures everything fits and operates exactly as intended, giving you clean, factory-quality results, proper wiring or mounting, and avoiding the risks of DIY mistakes. You’ll save time, avoid frustration, and get peace of mind knowing the job is done right the first time. Contact us to learn about our installation services and enjoy a seamless upgrade from day one.

FAQ

Shipping Information
For items that are in stock, purchases made after 9am EST will be usually be shipped out in the next 1-2 business days. Please inquire to confirm lead times if you have specific time constraints. Orders will be sent via signature required at our discretion unless otherwise requested.

International Shipping
Any and all customs duties, taxes, import fees, and/or tariffs assessed in connection with the purchase shall be the sole responsibility of the customer/end user.

Return Policy
We have a 30-day return policy, which means you have 30 days after receiving your item to request a return. To be eligible for a return, your item must be in the same condition that you received it, unused and in its original packaging. All returns are subject to a restocking fee based on item and package condition. Buyer is responsible for paying for return shipping costs. If you need a return label, we will email you a return label and deduct cost from refund. Original shipping costs are not refundable. Special order items are not eligible for return.

Cancellation Policy
In order to cancel your order you must email within 24 hours of placing your order or before your order has shipped, whichever occurs first. Special order items are not eligible for cancelation.

Exchange Policy
We have a 30-day exchange policy, which means you have 30 days after receiving your item to request an exchange. To be eligible for an exchange, your item must be brand new in box. Buyer is responsible for paying all shipping costs to exchange product.

Product Description

Unlock transmission tuning capabilities on your 2020–2026 C8 Corvette with the HP Tuners GM T46 TCM Upgrade Service. Designed specifically for Corvettes equipped with the Tremec dual-clutch transmission and T46 Transmission Control Module, this one-time upgrade allows the factory TCM to be licensed, read, edited, flashed, diagnosed, and data logged through HP Tuners' VCM Suite.

This is a send-in service for your vehicle's original TCM, not a replacement or exchange module. Once HP Tuners upgrades the controller and it is reinstalled in the vehicle, tuners gain access to supported transmission calibration functionality through VCM Editor and advanced logging through VCM Scanner. This makes the service especially valuable for modified C8s where optimizing the transmission calibration alongside the engine tune can improve the overall performance package.

HP Tuners' T46 support also enables complete ECM + TCM tuning workflows, allowing professional tuners to develop a more cohesive calibration package for naturally aspirated, supercharged, turbocharged, and other modified C8 Corvette applications.

Fitment Notes

  • Fits 2020–2026 Chevrolet Corvette C8 Stingray
  • Fits 2023–2026 Chevrolet Corvette C8 Z06
  • Fits 2024–2026 Chevrolet Corvette C8 E-Ray
  • Fits 2025–2026 Chevrolet Corvette C8 ZR1
  • Designed for vehicles equipped with the Tremec T46 Transmission Control Module
  • Requires the vehicle's original TCM to be removed and sent to HP Tuners
  • This is an upgrade service only — a replacement TCM is not provided
  • Requires an HP Tuners MPVI4 interface
  • Requires the latest VCM Suite BETA
  • Requires 6 Universal Credits after the TCM has been upgraded
  • Universal Credits are sold separately.

Included

  • One-time upgrade of your original GM T46 TCM
  • HP Tuners transmission tuning access for the upgraded controller
  • Compatibility with VCM Editor
  • Compatibility with VCM Scanner
  • Support for RTD4 and Tune Delivery Network remote-tuning workflows.

Product Specs

  • Manufacturer: HP Tuners
  • Service: GM T46 TCM Service (Global B)
  • SKU: TCM-GB-T46-U
  • Controller: Tremec T46 TCM
  • Application: C8 Corvette Dual-Clutch Transmission
  • Service Type: Original-module send-in upgrade
  • Interface Required: MPVI4
  • Software: Latest VCM Suite BETA
  • Licensing: 6 Universal Credits
  • Remote Tuning: RTD4 / TDN supported
  • Typical Processing Time: Up to 10 business days after HP Tuners receives the module, excluding shipping time.

Product Features

  • Unlocks TCM Tuning – Enables supported transmission calibration editing through HP Tuners VCM Editor.
  • Read, Edit & Write Capability – Provides access to supported T46 transmission calibrations rather than limiting users to engine tuning alone.
  • Advanced Transmission Data Logging – Use VCM Scanner for transmission diagnostics, logging, and calibration analysis.
  • Complete ECM + TCM Tuning – Allows tuners to develop engine and transmission calibrations together for a more complete performance package.
  • Remote Tuning Support – Compatible with HP Tuners RTD4 and Tune Delivery Network for supported remote calibration workflows.
  • One-Time Controller Upgrade – Once the original TCM is upgraded and licensed, it can be tuned through HP Tuners without repeatedly sending the controller back for each calibration change.

Why Upgrade?

For years, one of the major limitations when tuning the C8 Corvette was access to the dual-clutch transmission controller. Adding horsepower through engine modifications is only one part of the equation—the transmission calibration also plays an important role in how effectively the vehicle delivers that power.

The HP Tuners T46 TCM Upgrade Service gives tuners access to supported transmission calibration parameters so the DCT can be addressed as part of the overall vehicle calibration. That's particularly important as C8 builds progress beyond basic bolt-ons into more substantial engine modifications and higher power levels.

It also completes HP Tuners' expanding Global B ecosystem. Depending on the C8 model, the appropriate ECM service can be combined with the T46 TCM service to create a complete engine and transmission tuning solution.

Important: This product does not include an MPVI4, Universal Credits, or an actual custom transmission tune. It is the service required to make the factory T46 TCM accessible for supported HP Tuners calibration.

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