Looking for some direction if anyone could help. I am one of four working on a new project. We bought a GM Performance LSX Supercharged with a Connect and Cruise 4L85E automatic transmission. The car we are building is a 1969 Camaro but we are using as many of the interior components from a 2011 Cadillac CTSV that was hit in the rear. We have the ECU and TCU that came with the Connect and Cruise package, but we also have all of the wiring harness from the CTSV including ECM and BCM.
Our two main hurdles as of now are fuel gauge and ignition. The fuel system on the original CTSV has two signals coming from the tank, they get averaged by the ECM and sent to the body control module (BCM) then sent onto the gauge via a LAN connection (as far as we can tell). We would like to use the stock fuel gauge with an aftermarket tank and fuel pump. Does anyone know how to use the stock fuel gauge with this set up? Secondly, the ignition. As far as we can tell the ignition on the CTSV has a 5 volt signal that is sent to the ecm then onto the body control module which sends a signal to the starter (once again via LAN connection / signal) for starting the engine. We would like to use the stock steering column, stock key fob and as many other oem / stock items that we can from the CTSV being installed into the 1969 Camaro. Any direction would be greatly appretiated. We could always give up and use a standard 12 ignition signal and an aftermarket fuel gauge. Thanks again.