Recently finished a sas swap on my 2000 silverado. I Used a dana 60 front, sterling 10.25 rear, Using 85 k20 calipers front and rear.
New calipers, new hard lines, rubber lines. I removed the abs module, and ran the brake lines right to the master cylinder. Bench bled the master, and bled calipers. I get a solid stream of brake fluid, no air. I've done the two man brake bleeding, and get no air.

I've tried two masters, and two boosters, rechecked all fittinga. When I unhook the vacuum line from the booster the pedal is rock hard, but with the vacuum line hooked up it drops to the floor. I'm at a lost, what is going on with the brakes?

 

Vacuum booster is a pos and doesn't belong on a truck. A hydroboost swap would be inexpensive and yield very good results

 

That's happening in about a month or so, but I'd like to have brakes before then.

 

Booster may of **** the bed

 

Sounds like time to swap to hydroboost.....

 

Just finished swapping to hydroboost. Cost a whole $120 for everything. $60 for hydroboost, master cylinder and brake pedal. $30 for pressure lines. $20-30 for misc fittings, hoses, clamps, fluids.
Best upgrade I've ever done, wish I did it sooner !
My only concern is, does it put more strain on the power steering pump? If so what's a good upgrade for a new pump ?

 

Nope, pump is fine. Only difference should be the fittings.

 

Maybe upgrade the spool valve??...