2006 Chevrolet Trailblazer brakes problems

Brakes failed for no apparent reason around 8:00 am that morning. My friend and I was driving to my home in his 2006 Chevrolet Trailblazer after many stops that morning. We was on the interstate doing 65 MPH. I noticed the traffic ahead approaching and I said "cars" indicating to my friend to slow down. He said "I have no brakes!" We narrowly missed the first cars and while readjusting we came into contact with the driver side of three vehicles rolling us on our side!

Tl* the contact owns a 2006 chevrolet trailblazer. While driving various speeds, the vehicle was involved in a crash on three occasions for the same failure. The contact stated that the brakes malfunctioned in the same format three times since june of 2014. During the first occasion, the brake pedal made a popping sound, vibrated, and traveled to the floorboard. In turn, the contact crashed into the preceding vehicle. The air bags did not deploy. A police report was filed and there were no injuries.