Help! Isuzu npr hd
 

Hello reddit, so I’m working on a 2005 Isuzu npr hd and the pedal is falling to the flooring while the https://192168ll.onl/https://xender.vip/ https://testmyspeed.onl/ truck is on. I drove the truck all the way from Detroit to jersey with no issues. Yesterday I took the truck for a test drive and while driving the brake pedal lost all pressure. The brake booster light came on and you could hear the pump going. I’m going to try bleeding the brakes out tomorrow and see if that helps but I wanted to know if anyone had other suggestion since not even 2 weeks ago the truck ran n drove fine