BYO DPF/DEF/EGR Delete Kit | E66 ECM Send-In
- LM2 3.0L Duramax Delete Kit (2022–2023 Chevy/GMC 1500) | DPF/DEF/EGR Delete | E66 ECM Send-In
- Tuner Kits
- Sasquatch Diesels
- Kit add-ons are found below. The more you add the more you save!
Kit Add-ons
Click "add to kit" to add an item to your kit. The more you add the more you save! Included items can be removed from your kit by clicking the red button "remove from kit". You can only have a Full Exhaust or a DPF pipe added to a kit at a time.
Product Details
2021–2023 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:
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All 3.0L Duramax SUVs
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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
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If it’s an SUV: it’s E66.
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If it’s a 1500 pickup:
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Large new-style center screen = Refresh = E66
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2022 model year (best check): look at the 12th digit of your VIN
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4 or lower = Non-Refresh (typically not E66)
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5 or higher = Refresh (E66)
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Supported Vehicles
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2021–2023 Cadillac Escalade 3.0L Duramax LM2
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2021–2023 Chevrolet Suburban / Tahoe 3.0L Duramax LM2
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2022–2022.5 Chevrolet Silverado 1500 3.0L Duramax LM2
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2022–2022.5 GMC Sierra 1500 3.0L Duramax LM2
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2021–2023 GMC Yukon 3.0L Duramax LM2
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
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Prepaid Send-In ECM Upgrade (E66 unlock service)
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GDP E66 Tune File
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Interface (flash tool)
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Credits (used to license the ECM after upgrade)
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LM2 CAN Bus Plugs
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DPF Delete Pipe
Optional Add-Ons (Menu Buttons)
These are NOT included unless added using the menu selections:
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EGR Delete Kit (must be added via menu buttons)
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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:
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High-quality 4-ply silicone coolant hose (1) + caps (2)
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Ground cable (1)
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Blocker plates for EGR valve & cooler (2)
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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:
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improved exhaust flow
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reduced exhaust gas temperatures
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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.
Shipping and Returns Policy
Important Notice: Please Read Carefully
Shipping Costs
Our shipping rates apply to orders shipped within the United States and Canada.
Shipping Times
- Air Shipping: Orders placed with air shipping by 2:00 PM EST on a business day will ship the same day.
- Ground Shipping: Our goal is to process and ship within 24-48 hours during business days, unless your order contains custom tunes that are preloaded which may take an additional 1-3 business days to ship.
Shipping Delays
Please be aware that we are not responsible for shipping delays due to weather conditions, natural disasters, or any other events beyond our control. No refunds will be issued for delays caused by such events.
Special Shipping Information
- Alaska and Hawaii:
Orders shipping to Alaska and Hawaii must select 2nd Day Air. Overnight shipping may not be available for remote areas, and these locations may experience longer delivery times than stated. - Remote Areas:
Some remote areas in Canada and other regions may incur additional shipping costs. If additional fees apply, we will notify you, and your order will be shipped once the extra shipping cost is paid. - International Shipping:
For shipping outside the US and Canada, please contact us through our contact page for assistance. - Large Packages:
All Full Exhausts, Pipes, and Air Intakes ship GROUND!
Returns Policy
- General Return Policy:
Due to the specialized nature of our products, we generally do not accept returns. Most items are VIN-specific or custom-built to order. - Defective Items:
We only accept exchanges for defective items. We recommend professional installation for these items. If a product is defective and cannot be exchanged or repaired, a refund of the original purchase price will be issued upon receipt of proof of malfunction or damage. - Return Exceptions:
In certain cases, we may make exceptions for returns. If your return request is approved, a 30% restocking fee will be applied. All items must be returned in their original packaging, and return shipping costs will not be refunded. - Cancellations:
All sales are final. If you cancel your order after it has been placed but before it has shipped, a 5% processing fee will apply. - Non-Returnable Items:
Certain items, such as hard parts (e.g., EGR kits, DPF pipes/exhaust, pyro kits, throttle valve kits, exhaust tips, and intakes), are not eligible for return unless an exception is made. If an exception is granted, a 30% restocking fee will be applied, along with the cost of return shipping.
Contact Us
Before returning any items, please contact us for specific shipping instructions.
Customer Testimonials
Sasquatch Diesels transformed my truck's performance!
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