First I would like to say that I received good info. on changing the fuel pump on my sister-in-law's 2001 Chevy. Lifted the bed and changed the pump w/o dropping the tank. Now my brother-in-law who has a 2003 Chevy Silverado, 4.3 liter engine and 4 wheel disc brakes. There is no brake pedal at all. I moved the master cylinder forward from the brake booster and saw no brake fluid. No fluid is visible at all possible locations. I opened the right rear caliper and only got a trickle of brake fluid. There is no pedal even with the engine off. Should I take the M/C off and try to bleed it to see if fluid is pushed from the reservoir? I thought about removing the bottom lines from the combination and see if fluid can be pushed thru this valve. Any ideas are greatly appreciated.