Clicking Noise When Hitting Brakes When Truck Is Running

[99silverado1500]

Whenever I tap my brakes with it in park, I just noticed now that it clicks, like almost like a switch track piece on a railroad layout. Its a decently loud click too or a switch ifyou want to call it that. I never noticed it before so maybe its something new. Does not do it any other time other then running in park. When running and driving/reverse it doesnt do it, and when the ignitions off it doesnt do it. Kinda stumped to as what would make a switching or clicking noise with the brakes.

[NothinButBowTies]

I believe what you are referring to is the BOO switch - Brake On Off Switch. The noise is normal.

[Rocco715]

Yeah, I haven't really noticed it in my new truck but before my dad got his Denali he had an H2 and everytime I put my foot on the brake when in park I always heard the clicky