I have a 1991 GMC Jimmy i noticed when i turn on the parking brake lights when the dimmer switch is at its fullest brightness the door buzzer starts buzzing. when i turn the dimmer down it stops buzzing.

I checked the fuses all the fuses are good, could be some sort of ground issue or is it a issue with the ignition switch. idk

 

any one know where the buzzer is located under the dash?
I want to remove the buzzer, since its annoying and useless.

 

I have the same exact problem! Just started today. Did you solve it yet? If anyone knows how to fix this I'd really like to know because it's really annoying. I know this thread is 3 months old but I just wanted to let you know someone else has the same problem and see if you have a solution.

 

FIXED! i removed the buzzer from under the drivers side dash.

Just follow your ears and its located atop around the hood release cable handle.

It was a black box 3 in x 3in x1 and just pulls out toward the front of the vehicle.