2021-2024 SUV Duramax 3.0L AMDP HP Tuners Custom Tuning

Fits

Note: These are Tune Files Only! You will require an MPVI4 device and the specific Unlock service mentioned below!

Wake up your 3.0L LM2 Duramax SUV with AMDP’s custom HPTuners calibration, designed to bridge the gap between luxury refinement and raw diesel performance. These custom tunes deliver serious power gains and a sharper, more responsive throttle while preserving the reliable character of your luxury hauler. Whether you're looking for fuel efficiency or a +50 HP boost, this suite transforms your driving experience across the entire RPM range.

*IMPORTANT: You must have the HP Tuners E66 ECM Unlock Service done first. Click Here!

*IMPORTANT: If you want Transmission Tuning as well, you must also have the HP Tuners T93 TCM Upgrade Service (Global B) done first. Click Here!

TDN Code: MNFS-4601

Part Number: LM2-SUVHP-1

Power Levels

• Level 1: 0 HP – Designed for drivers seeking a delete-only option. Maintains stock power output while optimizing engine efficiency. Ideal for daily driving with enhanced fuel economy and reliability.

• Level 2: +30 HP over stock – Adds approximately 30 HP and 70 lb-ft of torque over stock for a noticeable performance boost. Enhances mid-range torque for better acceleration and towing capability. Maintains factory safety parameters and emissions equipment for compliance. Improved fuel economy under light throttle or highway driving conditions.

• Level 3: +50 HP over stock – Delivers maximum power with approximately 50 HP and 110 lb-ft of torque over stock. Requires an aftermarket S&B cold air intake (recommended) to ensure safe operation due to increased airflow demands. Optimized for performance driving with significantly improved throttle response and power delivery across the RPM range. Not recommended for heavy towing due to increased thermal load; ideal for spirited driving or light-duty applications. Optimized for real-world use: Smoother throttle mapping, reduced lag, enhanced shift quality, and better towing manners without sacrificing long-term reliability. Maintains factory-like refinement – ideal for daily drivers, family haulers, or luxury SUVs that demand both capability and comfort.

Transmission Tuning

TCM tuning is an available option. It requires the appropriate HP Tuners TCM licensing/unlock (via send-in service for the T93/TCM module on these platforms) and pairs perfectly with the engine tune for a fully coordinated performance package.

• Firmer, quicker shifts with reduced shift times for crisper acceleration and better power delivery.
• Optimized shift points and torque converter lockup strategy for improved efficiency, reduced slip, and less heat buildup during towing or spirited driving.
• Enhanced overall drivability – smoother light-throttle transitions, eliminated lazy or delayed shifts, and more confident highway passing.
• Maintains reliability with safe torque management limits tailored to your power level.

Requirements:

• (6) Credits for ECM Tuning and (4) Credits for the TCM tuning. HP Tuners Universal Credits
• HP Tuners MPVI4 device.
• Tune Delivery Network: HP Tuners TDN App for seamless file exchange and flashing.
• HP Tuners 2021+ GM E66 ECM Service (Global B): Required to access and modify the factory ECM.
• Transmission Tuning: Planning to tune your 10-speed automatic? You will require the 2019+ GM T93 TCM Upgrade Service (Global B)
• 2020-2022 LM2 Duramax CAN BUS Plug Kit: Essential hardware to enable proper communication
  
• Once you’ve shared your stock read with your tuner in the TDN app, please email us. We’ll notify the tuning company and keep things moving.