I am trying to start an LY6 6.0/6l90. It is a takeout from an 08 silverado. It's a standalone setup using stock ecm and harness. This is going in an older car, no bcm with aftermarket fuel pump and fuse block.
The engine won't start. Fuel cut off type pid shows "starter". I have disabled vats and the starter diagnostics, but the problem remains. Is there something I missed?
Thanks,
Tom