GM E66 ECM Service (Global B) - Upgrade Only

HP Tuners is now offering support for the GM Global B E66 ECM found in various 2021+ GM vehicles powered by the 3.0L Duramax LM2 engine (models listed below). This one-time, send-in upgrade service is required to capabilities in VCM Suite (BETA).

Shipping address for send-in E66 ECM service (Global B): HP Tuners (ATT: GM E66 ECM Service [Global B]), 700 Eastwood Ln, Buffalo Grove, IL 60089

This is a send-in service which means you must first send us your original ECM. Please read this page in its entirety before purchasing.