I keep getting a service stability system message and stability system engaged. on 2004 Cadillac SRX

when the stability system is engaged I cant press on the breaks my car makes this wierd grinding noise what could be happening with my car.

Asked by for the 2004 Cadillac SRX
To be able to pinpoint the problem, without performing a diagnosis is impossible. The ABS system will need to be scanned for Fault Codes, to see what sub system is malfunctioning.

Based on your description, it could be an issue with a Wheel speed sensor, but a proper diagnosis would need to be done FIRST.