ACDelco E78 ECU (MPC5566) — Processor, Protocols, Vehicles & Damos Maps

Technical passport of the ACDelco E78 ECU: MPC5566 processor, fitment (61 vehicles: Buick, Chevrolet, GMC, Holden, Opel, Universal ECU Protocol, Vauxhall), Bench/Boot PFLASH + DFLASH read/write protocols and checksum recalculation.

1. HARDWARE READ/WRITE PROTOCOLS ON THE BENCH (BENCH / BOOT / OBD — 6 VARIANTS)PCMFLASH / KESS3 / FLEX / BENCH

Brand	ECU variant	MCU	Modes	Supported operations (PFLASH / DFLASH / CheckSum)
Buikc	`ACDelco E78 MPC5566`	`MPC5566`	Bench • Boot	`Read/Write Ext EEPROM/Ext FLASH, Read Password, CheckSum`
Chevrolet	`ACDelco E78 MPC5566`	`MPC5566`	Bench • Boot	`Read/Write Ext EEPROM/Ext FLASH, Read Password, CheckSum`
GMC	`ACDelco E78 MPC5566`	`MPC5566`	Bench • Boot	`Read/Write Ext EEPROM/Ext FLASH, Read Password, CheckSum`
Holden	`ACDelco E78 MPC5566`	`MPC5566`	Bench • Boot	`Read/Write Ext EEPROM/Ext FLASH, Read Password, CheckSum`
Opel	`ACDelco E78 MPC5566`	`MPC5566`	Bench • Boot	`Read/Write Ext EEPROM/Ext FLASH, Read Password, CheckSum`
Vauxhall	`ACDelco E78 MPC5566`	`MPC5566`	Bench • Boot	`Read/Write Ext EEPROM/Ext FLASH, Read Password, CheckSum`

ECU model	Processor (MCU)	Vehicle brand fitment	Files in database	Diagram & ROMs
ACDelco E78	`MPC5566`	Buick, Chevrolet, GMC, Holden, Opel, Universal ECU Protocol, Vauxhall (61 vehicles)	Vehicle variants in DB: 61 (Stock & Damos matched by software)	Passport & files →