DIESELR MPVI3 E66 (Global B) Tune Files (2021-2025 Duramax LM2 & LZ0 3.0L)
DIESELR MPVI3 E66 (Global B) Tune Files (2021-2025 Duramax LM2 & LZ0 3.0L) - MPVI3 / Single Tune is backordered and will ship as soon as it is back in stock.
Confirm vehicle fitment
Confirm vehicle fitment
Confirm fitment before ordering. Match the year, make, model, trim, engine, drivetrain and selected options shown on this page. If any detail is unclear, search your exact vehicle or contact us before checkout.
Shipping expectations
Shipping expectations
Availability and processing time can vary by manufacturer. Available shipping choices and charges appear at checkout. Tracking is emailed after shipment. Oversized, special-order and supplier-shipped items can require additional processing time.
Returns and cancellations
Returns and cancellations
Please review eligibility before purchase. Installed, used, electronic, custom, special-order and clearance items may have return restrictions. Contact us promptly if you need to change or cancel an order.
What’s included
What’s included
The product description and selected variant determine what is included. Items shown in lifestyle or installation photos are not included unless they are specifically listed in the description.
DIESELR MPVI3 E66 (Global B) Tune Files (2021-2025 Duramax LM2 & LZ0 3.0L) - MPVI3 / Single Tune is backordered and will ship as soon as it is back in stock.
Buy with confidence
Verify fitment, selected options, availability and included components before checkout. Secure payment options and order confirmation are provided at checkout.
Description
Description
The DIESELR MPVI3 E66 Tune Files (2021–2025 Duramax 3.0L LM2 & LZ0) are engineered to give GM truck and SUV owners a proven way to improve drivability, throttle response, and fuel efficiency. Built on the HP Tuners platform, these calibrations are tailored for vehicles running the E66 ECM (Global B) and provide a reliable solution for the modern 3.0L Duramax lineup.
Compatible with both LM2 and LZ0 engines, these tune files work across a wide range of models, including the Chevrolet Silverado 1500, GMC Sierra 1500, Chevrolet Tahoe, Chevrolet Suburban, GMC Yukon, and Cadillac Escalade. Whether you’re running the 2021–2026 LM2 engine or the updated 2023+ LZ0, these files ensure safe and consistent performance.
Requirements
- Unlocked E66 ECM (Global B): Must be sent to HP Tuners for unlocking (sold separately).
- 6 Universal Credits: Required from HP Tuners to flash your tune (sold separately).
- MPVI3 Device: Required for flashing via HP Tuners VCM Suite.
Key Features
- Designed for GM’s E66 ECM Global B architecture
- Three power levels included
- Enhanced throttle response and efficiency
- Optimized for both LM2 and LZ0 engines
- Coverage for Silverado, Sierra, Tahoe, Suburban, Yukon, and Escalade
With the DIESELR MPVI3 E66 Tune Files (2021–2025 Duramax 3.0L LM2 & LZ0), you get a straightforward tuning package backed by Dieselr’s trusted support and tested calibration process.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Product features
Use this section to highlight specific product features to your customers.
Product comparison grid
Add content here to explain a bit about the range of products on offer and which ones may be most suitable for your customers.

