brake line rusted out and master cylinder not working

Friday Evening June 3rd, 6:30pm. I left work and was on the way home when all hopes of enjoying a long relaxing weekend were dashed. I was driving at approximately 35mph going down a hill. There was a car ahead of slowing down to make a left turn. To my right is a ditch sloped downward featuring a large overgrown briar patch and a culvert. As I began to brake for the car in front of me, the brakes on my 2004 Chevrolet Silverado Z71 4X4 went out completely! I have unfortunately been in a couple of wrecks in the past and I didn’t want to be involved in another one so I instinctively swerved onto the “shoulder" (for lack of a better term) narrowly missing the car and wound up in the ditch landing on the culvert. Fortunately the truck was relatively ok aside from a piece of brush sticking out of my front bumper and the left fog light was cracked. I put the truck in 4 low and managed to climb up the other side. I made it home after 16 mile drive. I was a nervous as a long tailed cat in a room full of rocking chairs. The brake fluid reservoir was half full. I took the truck to my local mechanic shop where they are working strenuously as i type this.Thankful that this ordeal wasn’t as bad as it could have been but I will not purchase another Chevy! Hope this helps! Be safe!

I purchased my 2004 Silverado new and have had the rear brake pads, rotors and calipers replaced at 69,000 miles and the front pads rotors replaced at 80,000 miles. My problem is no matter how hard I try to brake it's like driving an old car without power brakes. The brakes won't lock up, the truck eventually stops and due to the fact that I'm not a fast driver and don't tailgate this has not been an issue yet, I just hope I never get in an emergency situation where I have to lock the brakes up to stop I have read where other owners of Chevy trucks from these years also have the same problem.

brake pedal goes to the floor and absolutly no brakes

I cant believe this!! Ive read all over the internet that the booster was recalled because a seal would blow out and lose your brakes. That was back in 04! But now I call chevy and they tell me there isnt any recalls on my truck! Thats bull because i know of 4 recalls on this vehicle. I can tell my brake lines have already been changed to stainless steel lines, so the owner before me must of changed them. (im the 2nd owner) The brakes on this truck are terrible! They are always spongy and soft! People all over are crashing the trucks because of this problem! It needs to be resolved!