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Ok, I’ve tested, and replaced everything I could rule out. 03 c5 90k driver window and lock will not work with the engine running... will work when engine is off. 12.3 volts running. 11.7 off. Replaced regulator, door buttons and battery to rule those out. Cleaned connectors and pulled the door wiring out and inspected. no broken wires when I rang them out.
Other noted symptom is sometimes very rarely will the driver window not roll down or up with the engine off key on... if I roll the passenger window down and simultaneously the driver window will then work, while saying this if the passenger window is not in motion the driver side will not work. Key off key on. Driver window works. Engine running will not. I’m at a loss beside replacing the driver door module and the BCM and seeing if that goes it. Driver door lock is exactly the same