2005 Buick LeSabre Limited 6 Cyl 3.80L
What is causing this sound?
Hello. I just recently bought a used 2005 Buick LeSabre Limited. I noticed that the brake warning light is on. And whenever I brake, my car makes a low hollow humming noise. Almost a pulsing hollow sound. It makes this sound when I brake and continues to make it for a few seconds when I release the brakes and start driving again. Any idea what might be causing this noise?
First question - have you checked the master cylinder brake fluid level, and refilled as necessary? If not, then start with this step.