air in brakes?

[only 31s]

when i fisrt start the burban and drive the first moderate braking i do has a nasty growl and easily locks,it does it one more time {less intense} then dissapears! am i getting air bubbles and then purging them or maybe it the fluid getting old? i drive it every day after its fopar brakes r where they shold be. 350 tbi regular braking sys

 

[southernspeed]

just sounds like a little rust forming on the surface overnight, then you scrub it off on the first couple of applications. My wifes little Furd does it too. My '91 K5 does it after it's been sitting a couple of days in the right sort of weather (either wet or high humidity)

 

[dyeager535]

Mine too. After first apply in the morning, the noise and touchiness is gone.