The HMI (Human Machine Interface) module is the primary infotainment controller used on most 2013–2020 GM vehicles equipped with MyLink,… Read more HMI

The Center Stack Module (CSM) is GM’s next-generation infotainment controller, used on 2017.5+ GM vehicles. It debuted on the Cadillac… Read more CSM

The Audio Control Module (ACM) is the radio in GM HMI-based infotainment systems — separate from the HMI module and… Read more ACM

The Body Control Module (BCM) is the central computer that manages a GM vehicle’s body electronics: interior and exterior lighting,… Read more BCM

The Vehicle Communications Interface Module (VCIM) is the OnStar telematics module in GM vehicles. It contains the cellular modem, GPS… Read more VCIM