2012 Cascadia 113. Should I avoid?

Good morning guys!
I'm looking at a 2012 Cascadia just for my personal use and just looking at some honest opinions.
Detroit DD13 with 886,xxx mles
ABS light is on.
No check engine light
Truck runs and drives.
Display shows, "Leg Advisories. 07(arrow up) Roll 20(arrow up) BRK" Is this ABS advisories? What is it and what does it mean?

Should I avoid this truck? She isn't pretty, but I can fix/ignore that.