Chevy blazer is making loud noise and not wanting to stop correctly it the ball bearings?

A loud noise and braking problems in a Chevy Blazer are unlikely to be solely caused by ball bearings. Ball bearings are part of the wheel bearings, and while a failing wheel bearing *can* make noise, it usually presents as a rumbling or growling sound that increases with speed. It doesn't directly affect braking.

Braking problems, especially if accompanied by a loud noise, could indicate several more serious issues:

* Brake pads/shoes: Worn or damaged brake pads or shoes will make a squealing or grinding noise and reduce braking effectiveness.

* Brake rotors/drums: Warped rotors (disc brakes) or drums (drum brakes) can cause vibration and noise when braking.

* Calipers/wheel cylinders: Seized or sticking calipers (disc brakes) or wheel cylinders (drum brakes) can cause dragging, leading to reduced braking, overheating, and noise.

* Brake lines/hoses: Leaking or damaged brake lines or hoses can drastically reduce braking power.

* Master cylinder: A failing master cylinder can also lead to poor braking.

* ABS system: Problems with the Anti-lock Braking System (ABS) can cause unusual noises and braking behaviour. This is more likely to be accompanied by a warning light.

It is extremely dangerous to drive a vehicle with compromised brakes. You should not drive the Blazer until it has been inspected by a qualified mechanic. The mechanic can diagnose the exact cause of the noise and braking problem and perform the necessary repairs. Ignoring this could lead to an accident.