Adaptive Equipment problems of the 2004 GMC Sierra 1500

I was approaching a stop sign driving approximately 45 mph. When I applied the brakes the pedal went to the floor, and the vehicle wouldn't stop. I manuevered past several vehicles almost striking them. I was able to apply the emergency brake to stop the vehicle after some distance past the intersection. I am a police officer with 25 years on the job. I have attending various driving courses related to my profession. If a lay person was in this situation a serious accident would have happened. I barely escaped the accident due in part to training and a large amount of luck. On the day of the incident the vehicle had stopped normal at three prior intersections without giving any warning of a potential problem. I have read on line the theory about the salt causing the damage to the brake lines. I have never driven this vehicle in the snow since it is a spare vehicle. The vehicle has 72000 miles a large majority of those miles driven on the highway (summer and fall). I bought this vehicle new from the dealership in 2004. The cost to repair the brake lines was $1,100 dollars. A recall should be made in regards to this defect before someone is killed or seriously injured. I had a mechanic shop repair the vehicle since the dealership claimed they had no other reported failures on this vehicle. A quick look on various websites showed that to be a false claim. Anyone driving these types of vehicles please have your brake lines inspected by a mechanic.