In the past few days, whenever the brake pedal is released there is a squeak that seems to come from the middle of the truck. Actually haven't been able to pinpoint the location but it does it very consistently. Releasing the brake very, very slowly is the only time when the pedal does not squeak. Any thoughts or suggestions? Thanks guys.

Also: when depressing the pedal the squeak is NOT present; only on release is there an issue.

Scott