ABS/ASR Issues - '00 Z28

[BLUCAS]

Right after I had a small accident (hood and bumper cover replaced, not much damage) a couple of months ago my ASR/ABS/Brake lights starting coming on. It doesn't happen until after I've driven a few miles.

I had the car scanned with a SOLUS and it came up with CO896 Device Voltage Range Performance and CO550 ECU/CCU Malfunction.

I have visually inspected all the connection around the ABS Module, wheel sensors, and where the big wiring harness underneath the rear drivers side of the car and haven't found any loose connections. What's the problem? Do I need a new ABS module?

BTW - car does have C5 wagon wheels on it, so they're different OD, but they've been on the car far longer than when this issue started. The issue started right after I put the car back on the road after the accident.

[Cutlass]

CO550 ECU/CCU Malfunction
This code always means you need a new ABS module. I would start there.