All ECU’s after 2019 appear to be encrypted, just like the TCU’s are after 2017. Gen V E92 ECU’s from 2016-2018 can be reflashed via HP Tuners software, 2019 ECUs are unknown at this time. The 2019 ZR1 Corvette LT5 engine introduced the E99 ECU which is further encrypted with on an over the air update service which requires a Factory Immobilizer Reset Service that is hard-coded to the vehicle’s VIN. The same will hold true for the 2020 C8 Corvette which uses the E99 ECU. HP Tuners offers an updates to both the E99 and E90 ECUs, plus the T87a transmission controller (see below). At this date I do not have current information on the actual part numbers for 2019 & 2020 ECU’s & TCU’s other than what was produced in 2018 that carried over like the T87A.
