Three problems related to brake fluid leak have been reported for the 2007 Chevrolet Silverado. The most recently reported issues are listed below.
Pulling out of arbys when pedal whent all the way to floor. Pulled over, brake fluid shooting all over engine. Brake lines corroded badly. Glad there was no one around, had to drive up on curve to stop.
Brake pedal went to floor. Found brake lines heavily rusted after only 6 years old. Left rear brake line blew, causing dangerously slow braking in rush hour. Narrowly avoided several crashes until I got home, crawled under it to find the puddle of brake fluid. I've have 20year old cars with better brake lines.
Coming home from car wash brake pedal felt spongy. Pulling into driveway the pedal went to the floor. Looked under truck and saw puddle of brake fluid on ground by left rear wheel. Brake line going to rear brakes had ruptured from major rust. Upon further inspection I found brake and fuel lines suffer from major rust and will need to be replaced ASAP.