General Motors 2006 E40 ECM/PCM * (Will NOT work with 2004/2005 Model year Vehicles) *
By 2008, federal law requires all factory controllers to be controller area network (CAN) based. GM got a jump on the new architecture with the Gen IV LS2 and truck LH6 engines in 2005. The totally new engine control module (ECM), dubbed E40, still used a processor from the Motorola 68000 series, but a newer and faster version. Flash memory size remained 1 megabyte, the same as existing LS1 PCMs, but it was a newer generation of flash. The increases in performance were complemented with a radical reduction in size as well. Following the nature of electronics evolution, the new box was drastically smaller than its predecessor, and also featured highly compacted, smaller connectors. The E40 also only controls the engine. Transmission control was separated out to a new stand-alone controller, the transmission control module (TCM), named T42. Yet both new units combined were still much smaller than one combination LS1 controller. The new TCM is also a flash-based unit, featuring 1 megabyte of memory. This separation of PCM to ECM and TCM allowed for easier powertrain integration between the various platforms utilizing Gen IV powertrains.
- Brand: AC Delco
- Type: GM Engine Control Module
- Color: Aluminum
- Motorola 68000 series processor
- 1 megabyte of memory
- 24x crankshaft reluctor
- E40 only controls the engine
- Transmission Control Module T42 is needed to control transmission
- Will NOT work for 2004/2005 Model Year Vehicles.