Conveniently upgrade your E41 ECM, found in the 2017-2023 Chevy Silverado and GMC Sierra 2500/3500 6.6L Duramax trucks (L5P and L5D applications), without removing it from the vehicle. Upgrade your E41 ECM in 20 minutes or less! This ECM upgrade kit enables read, write, and special functions in VCM Suite software using an MPVI2+ (with Pro Feature Set) or MPVI3 interface.

If you own a 2018-2023 model year, you can upgrade your truck directly via the OBDII port!

‼️IMPORTANT for Our Rental Program‼️

For ALL 2017 and Some 2018 trucks, the GM E41 ECM Upgrade Kit is still be required. Unfortunately, there's no VIN cutoff to determine which 2018 models need the unlock cable — you'll only know after connecting the MPVI3 to your truck and laptop and try and write your stock file back to the ECM.

If you do need it, we offer the E41 Upgrade Cable for rent:
🔧 $100 rental fee
💵 $100 refundable core deposit to Store Credit

Once you return the cable, your $200 deposit will be refunded.

We understand this isn’t ideal, but it’s the only way to confirm compatibility.

Note: This does not apply to 2019–2023 trucks.