[guye]

Thanks Geoff, I'll check them out.

Not a crate, Dave. Donor. My understanding is the stock ECU from our Commodores don't even have cruise control, but that is handled by the BCM (which uses the canbus feed from the ECU). I think this is the same for all GM cars using the E38 ECU.

Hence this eBay unit I mentioned effectively takes over that function. It splices into the dbw pedal (plugs in), then plugs into an ODB2 port (I've installed two in parallel just case) to receive speed info and brake and clutch depressions. It then interferes with and simulates accelerator use to maintain speed.

Sounds good in theory. Would like a reference though.