Having an issue. 4.6 Northstar LH2/6L50 swap into a CTS. No start, no injector pulse. Am I doing something wrong? Changed VATS Patches to disabled, along with starter diagnostics and clutch interlock to disable. Performed Write Entire as well. CTS has conventional ignition with 12v+ crank signal. That is wired straight to starter relay. All wiring has been checked. I'm stumped.