Brake Disc Caliper problems of the 2000 GMC Sierra

I own a 2000 GMC Sierra crew cab short box 4 by 4. I was driving down the road and heard a grinding sound, so I thought to limp it home. Bad idea, I was the two bolts that hold your caliper on, so that is your whole brake system, well it made my wheel lock up and caused me to loose control and hit the curb where I bent my rim and popped my tire, so I replaced the two bolts on driver back side and checked the passenger back side and those two bolts where loose. Very scary. So I tighten them both and like I said replaced the other two on the driver side. When I seen the way it was set up I was shocked because it was not a good idea and never seen calipers bolted like that, this happened three months ago well today I was driven and heard the same noise again and before I could stop all the way my tire locked up again but this time I was in control and stopped ok. I am freaking out because I have a five year old special needs daughter and don't want her to be in my truck if it decides to lock up and flip. So I went to the same auto shop and had it replaced again. Like I said I seen a lot of brake systems and this way they have it is not same and I imagine has caused deaths, if not yet it will, it about made me roll and screwed up my rims and new tires, I don't know if I should sell it because I do not have money to get them all replaced. So im going to see if there is a recall and if not there needs to be. My mom have a 2004 silverado chevy and I owned a 2002 before and both trucks brake system are different. I want to know why they are like this and why they change a good thing. I hope this was helpful. So if you hear grinding in tires make sure you stop and get it towed.

While driving west on central avenue in petal, I applied the brake pedal to slow the vehicle to make a right turn onto stevens street. I felt no resistance and looked down to see if I had missed the brake pedal somehow, but it had pushed with no resistance to the floor. Pumping the brakes repeatedly, I was able to obtain a small amount of braking and made the turn on stevens. Stopping at deep south cycles, I told the mechanic what had occurred and he noticed the rear wheels were very hot, indicating rear brake lockup. Indeed, at that time they were still locked up. We checked the emergency brake to see if it was applied and it wasn't. The brake fluid level was the proper level, also. After the brakes had cooled down I drove the truck a short distance to a repair shop on central avenue where they replaced the rear brake calipers and pads. They stated that the rear rotors had turned blue from the heat, and added that they "had seen a lot of failures of GMC brake calipers. ".

While backing my truck up to attach a trailer, I pressed on the brake pedal and it went to the floor. I had absolutely no braking ability. My truck ran into the trailer, causing minor damage. Upon inspection, it is evident that there is a failure of the brake line that runs to the driver's side rear caliper. A significant amount of brake fluid can be seen and smelled in this area. I am not able to drive the truck. It will need to be towed to a repair shop for what I assume will be expensive repairs.

: the contact stated the rear passenger side tire had excessive wear and a noise was coming from the rear of the vehicle at various speeds. The contact removed the tire and replaced the caliper, rotor, and shoes. The vehicle was not inspected by a dealer or independent repair shop.

Vehicle brakes damaged by road salt corrosion, causing rear brake calipers to seize up and brake disks to delaminate. Rear brakes were completely inoperable.