This might be a good option if you are not in a hurry:
According to GMPP, these controllers will be available in early 2008 with the following part numbers: LS2 19166568, LS3 19201861, LS7 19166567.
Features of the system:
- Harness has an OE style fuse/relay center (fully populated with required items). To keep wiring clean and centrally-located, there are additional vacant fuse and relay positions.
- A 12-wire bulkhead connector is broken out of the harness and includes user outputs such as tach signal, vehicle speed signal (if a vehicle speed sensor is connected at the transmission), malfunction indicator light, fused ignition power, fused battery power, and oil pressure sensor. A mating connector allows these outputs to be tied-in cleanly without cutting into the harness.
- Cooling fan control – system will power a fan when coolant reaches 212 F
- Fuel pump is controlled by the ECM
- Controls late-model LS series alternators