GM T46 TCM Service (Global B) - Upgrade Only

Tune the dual-clutch in your C8 Corvette. The Tremec T46 transmission computer in the mid-engine Corvette has to be upgraded before it can be tuned. This one-time HP Tuners send-in service upgrades your original TCM so you can edit shift calibrations, data log and read and write through the OBDII port with VCM Suite, or deliver tunes remotely through the Tune Delivery Network.

This is a send-in service. Your TCM has to come out of the car and ship to HP Tuners, so the car will be down while it's away. Please read this whole page before ordering.

Will it work on my car?

• 2020-2026 Chevrolet Corvette Stingray
• 2023-2026 Chevrolet Corvette Z06
• 2024-2026 Chevrolet Corvette E-Ray
• 2025-2026 Chevrolet Corvette ZR1
• 2026 Chevrolet Corvette ZR1X

Engine tuning on the Z06, ZR1 and ZR1X needs the separate GM E68 ECM Service (Global B).

What else you'll need (sold separately)

• 6 Universal Credits to license the T46 TCM.
• An HP Tuners MPVI4. The T46 does not work with the MPVI2, MPVI2+ or MPVI3.
• The latest VCM Suite BETA software (free from HP Tuners).

How it works

1. Confirm your car is covered and place your order. Have your VIN handy; HP Tuners requires it.
2. Our team emails you the order number and the HP Tuners shipping form.
3. Remove the TCM only, pack it carefully with the completed form inside, and write the order number on the outside of the box.
4. Ship it to HP Tuners with any carrier. Shipping to HP Tuners is the customer's responsibility; the shipping charged at checkout covers the return trip.
5. HP Tuners upgrades the TCM and ships it back.
6. Reinstall it, license it with 6 Universal Credits and start tuning.

Ship to:
HP Tuners, LLC
ATTN: GM T46 TCM Service (Global B)
[Your order number]
711 Dartmouth Lane
Buffalo Grove, IL 60089

Wait for our email before you ship. Please don't send your TCM until you have the order number and shipping form.

Before you ship: important

• Send the original TCM from your car, not a spare.
• Send the TCM only. Brackets, fasteners, wiring and other hardware may not come back with it.
• TCMs with heavy physical damage, broken connectors, water intrusion or signs of prior repair may be rejected.
• The car may need a dealer resync after reinstallation; that is the owner's responsibility.
• This service is performed at the owner's risk. Normal wear and weathering from the TCM's location in the car is expected.