GM E41 ECM Upgrade Kit

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), MPVI3 or MPVI4 interface.

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