|
If you're shopping for tuning, an ECM service, or a replacement ECM, your engine alone isn't enough to determine compatibility.
The 3.0L Duramax LM2 was produced with both the E46 and E66 ECM depending on the vehicle and model year, while the newer LZ0 engine uses the E66 ECM.
Here's how they break down:
E46 ECM (LM2)
The following vehicles are equipped with the E46 ECM:
- 2020 Chevrolet Silverado 1500 – 3.0L Duramax (LM2)
- 2021 Chevrolet Silverado 1500 – 3.0L Duramax (LM2)
- 2022 Chevrolet Silverado 1500 LTD (Limited) – 3.0L Duramax (LM2)
- 2020 GMC Sierra 1500 – 3.0L Duramax (LM2)
- 2021 GMC Sierra 1500 – 3.0L Duramax (LM2)
- 2022 GMC Sierra 1500 Limited (LTD) – 3.0L Duramax (LM2)
E66 ECM (LM2 & LZ0)
The following vehicles are equipped with the E66 ECM:
LM2 Applications
- 2022–2022.5 Chevrolet Silverado 1500 – 3.0L Duramax (LM2)
- 2022–2022.5 GMC Sierra 1500 – 3.0L Duramax (LM2)
- 2021–2023 Chevrolet Tahoe – 3.0L Duramax (LM2)
- 2021–2023 Chevrolet Suburban – 3.0L Duramax (LM2)
- 2021–2023 GMC Yukon – 3.0L Duramax (LM2)
- 2021–2023 Cadillac Escalade – 3.0L Duramax (LM2)
LZ0 Applications
- 2022–2025 Chevrolet Silverado 1500 – 3.0L Duramax (LZ0)
- 2022–2025 GMC Sierra 1500 – 3.0L Duramax (LZ0)
How Can You Tell Which ECM You Have?
There are two easy ways:
1. Check your vehicle against the compatibility list above.
2. Physically inspect the ECM.
The ECM part number and identification label will indicate whether your vehicle is equipped with an E46 or an E66 controller.
Why It Matters
The E66 ECM requires an ECM unlock before any custom tuning can be completed.
The E46 and E66 are different controllers and require different processes, so verifying your ECM before ordering helps ensure you receive the correct products and services.
If you're not sure which ECM your vehicle has, don't guess.
Send us your VIN or a clear photo of your ECM label, and we'll verify exactly which controller your truck is equipped with before you place your order.
|
