Why is my service stability light on?

Ok here's the brake down

05 cadillac escalade esv platinum 6.0

Found leak on the hydroboost after running dry on power steering fluid a couple times.

Changed hydroboost and ps pump. Along with a new brake light switch.

Finally got everything back to where it needs m to be a bled. Got brake light switch on. No brake lights, checked fuse, blown fuse. Ok so change that everything's going good again.

Now it is throwing up a service stability on dash.

Any ideas?