LM2 3.0L Duramax Delete Kit (2022.5–2026 Chevy/GMC 1500) | DPF/DEF/EGR Delete | E66 ECM Send-In

2022.5–2026 CHEVY / GMC LM2 3.0L (E66 ECM SEND-IN) — Complete Delete Kit

We’ve officially launched tuning support for select GM platforms running the E66 ECM, including a range of 3.0L Duramax LM2 SUVs and half-ton pickups. With the proper setup, you’ll gain full calibration control, scanning, and a noticeable improvement in day-to-day drivability.

IMPORTANT: You must verify your ECM before ordering.
If your truck is E46, this kit is not the correct option — please see our E46 kit instead.

 

POWER LEVEL (PICK ONE) 

• 0 hp
• 20 hp

Verify Fitment: E66 ECM (“Refresh” Trucks + SUVs)

What is the E66 ECM?

The E66 is GM’s newer engine controller used on Global B platforms. In the 3.0L Duramax world, it’s found on:

• All 3.0L Duramax SUVs

• 2022.5+ “Refresh” Silverado/Sierra 1500 pickups (and newer)

Where the E66 ECM is found (3.0L Duramax)

✅ All 3.0L Duramax SUVs (Tahoe / Suburban / Yukon / Escalade)
✅ 2022.5+ “Refresh” Silverado 1500 / Sierra 1500 3.0L
✅ 2023+ Silverado 1500 / Sierra 1500 3.0L

Quick checks to confirm you have E66

• If it’s an SUV: it’s E66.

• If it’s a 1500 pickup:

  • Large new-style center screen = Refresh = E66

  • 2022 model year (best check): look at the 12th digit of your VIN

    • 4 or lower = Non-Refresh (typically not E66)

    • 5 or higher = Refresh (E66)

Supported Vehicles

• 2021–2023 Cadillac Escalade 3.0L Duramax LM2

• 2021–2023 Chevrolet Suburban / Tahoe 3.0L Duramax LM2

• 2022–2022.5 Chevrolet Silverado 1500 3.0L Duramax LM2

• 2022–2022.5 GMC Sierra 1500 3.0L Duramax LM2

• 2021–2023 GMC Yukon 3.0L Duramax LM2

• Compatible with 2020–2026 Chevrolet Silverado and GMC Sierra 1500 with 3.0L LM2 Duramax E66

What to Expect

From reduced throttle lag and smoother shifting to improved towing response and overall drivability — customers typically notice the difference immediately. This is more than “ECM access”… it’s control over how the vehicle performs every day.

What’s Included

• Prepaid Send-In ECM Upgrade (E66 unlock service)

• GDP E66 Tune File

• Interface (flash tool)

• Credits (used to license the ECM after upgrade)

• LM2 CAN Bus Plugs

• DPF Delete Pipe

Optional Add-Ons (Menu Buttons)

These are NOT included unless added using the menu selections:

• EGR Delete Kit (must be added via menu buttons)

• S&B Cold Air Intake (must be added via menu buttons)

ATTENTION — New Release / Support Info

These are new-release items and manuals may not be included yet.
All setup and install questions must be handled through GDP Tech Support.

ATTENTION — ECM Send-In Required (We Cover Shipping)

✅ Included: We provide a shipping label and cover shipping.
📦 Your ECM must be sent in to be unlocked before tuning can be applied.

3.0L Duramax EGR Delete Kit (Add-On via Menu Buttons)

Kit Includes:

• High-quality 4-ply silicone coolant hose (1) + caps (2)

• Ground cable (1)

• Blocker plates for EGR valve & cooler (2)

• Intake plug (1)

Designed to support removal of the OEM EGR components to reduce restriction and carbon-related buildup concerns.

Professional installation is strongly recommended.

3.0L Duramax Cat + DPF Delete Pipe

Built from durable 16-gauge stainless steel for a precise fit with quality connections and hardware.

Benefits commonly reported:

• improved exhaust flow

• reduced exhaust gas temperatures

• stronger overall responsiveness and sound

✅ Uses the existing muffler

Professional installation is strongly recommended.

Legal / Use Disclaimer

For off-road / competition use only where permitted. Removing or disabling emissions equipment (DPF/DEF/EGR/CAT) is prohibited for on-road vehicles in many areas. Customer is responsible for ensuring legal compliance.