2020-2022 3.0L LM2 Duramax Parts Collection
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Product fitment and upgrade parts for the 3.0 Duramax LM2 (2020–2022)
This collection fits Chevrolet Silverado 1500 and GMC Sierra 1500 trucks with the 3.0 Duramax LM2 engine and factory emissions hardware. Coverage includes 2020, 2021, and 2022 model years with kits, tuners, exhaust and air intake part options for the GM 3.0 diesel platform.
|
Feature |
2020–2022 |
|
Engine Version |
3.0L LM2 Duramax (E46 ECM) |
|
Supported Models |
Silverado 1500 / Sierra 1500 Pickup |
|
Tuner Options |
OBD-II Tuner Package |
|
Unlock / ECM |
E46 ECM unlock required. ECU Unlock Tool: Stock file, infolog & vehicle data required. |
|
Tune Levels |
No SOTF supported. OBD-II Tuner Package: Level 1 (Stock Optimized), Level 2(+20 HP). |
|
EGR Delete Kit |
Available in Full Delete Kits or as a standalone kit |
|
Exhaust Options |
3" turbo-back exhaust system |
LM2 Duramax delete kit product groups for 3.0L trucks
These products cover DPF/DEF/EGR removal, calibration, and exhaust routing on Chevy 3.0 Duramax and GMC 1500 applications:
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Full DPF/DEF/EGR delete kit - ships with an OBD-II flash tuning interface, tuning credits, ECM E46 upgrade and unlock service, EGR delete kit, 3″ stainless steel CAT & DPF Delete Turbo-Back exhaust, and CAN BUS Plug Kit. Tune levels are fixed: Level 1(Stock Optimized), Level 2(+20 HP), no SOTF.
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OBD2 Delete Tuning Package - standalone tuning with OBD-II flash interface, custom delete tune file built from your stock calibration, and tuning credits. On the 3.0L LM2, traditional plug-in tuners do not exist - all tuning runs through OBD-II flash calibration. ECM E46 unlock required separately. Choose a single tune level (+0 / +20 HP).
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EGR & Cooler Delete Kit - EGR valve delete components, cooler delete hardware, gaskets, seals, and mounting hardware. Sold standalone or included in the full delete kit. Fits 2020-2022 LM2.
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3″ Turbo-Back DPF Delete Pipe - stainless steel turbo-back exhaust replacing the factory catalytic converter and diesel particulate filter from the turbo down to the mid-pipe. Retains the factory muffler and dual exhaust tips. Bolt-on fitment, no cutting or welding. Sold standalone or included in the full kit.
Why Dieselino works for LM2 installs and long-term service
Dieselino verifies fitment before shipping and supports orders with pre-purchase guidance, warranty coverage, and remote help for tuner setup after installation. That process reduces mismatched parts, repeat labor, and downtime during drive cycles.
- Pre-shipment fitment checks for year, engine code, routing, and product type.
- Remote support for tuner setup, file loading, and post-install diagnostics.
- Warranty coverage on supplied hardware, clamps, gaskets, and fittings.
- T-409 stainless steel exhaust with mandrel bends and repeatable hanger geometry.
- Multiple payment methods and tracked shipping across the U.S. and Canada.
FAQs
Yes. Install the tuner calibration before hardware changes, so the ECM does not request regen or set repeat error codes. Keep battery voltage near 12-14V during flash, and confirm the file matches your vehicle year. Off-road use only where emissions equipment is removed.
Flash the ECM first, then verify fitment, sensor connectors, and pipe routing before removing stock components. Install the pipe and EGR hardware front-to-rear, then torque clamps and check leaks after one heat cycle. Time is usually 3-5 hours for a shop and 6-10 hours first-time.
An LM2 Duramax delete can help with towing consistency on off-road builds when the tuner matches trailer load, tire size, and axle ratio. Owner-reported MPG changes are often +1 to +3 highway and +0.5 to +2 mixed, with results varying by speed and weight.
It may reduce soot loading and regen-related fuel dilution, which can lower intake cleaning frequency. Some shops and owners claim +25,000 to +75,000 miles before major emissions-related service, but claims vary. Keep oil intervals around 5,000–7,500 miles and watch EGT.
Owners install an LM2 3.0 Duramax delete kit to stop regen events, remove DPF/DEF/EGR fault loops, and reduce sustained exhaust heat under load. Some towing setups report 100-250°F lower EGT, but results vary by tune and trailer weight. Off-road use only where emissions hardware is removed.
For legal 3.0L Duramax upgrades, use emissions-intact tuning, intake and exhaust part changes, and charge-air leak testing. Typical gains are smaller, often +20 to +40 hp and +40 to +80 lb-ft, depending on calibration and fuel. Pressure-test the charge system at 20-25 psi before tuning.