Back with more questions!! sorry guys

[smartass12]

Info of what i have that might be needed to help answer...2001 5.3 ls motor with this http://www.summitracing.com/parts/rsd-j85315672 brake booster..

question 1..i have bled many brake lines in my day but never with ls motor (not that it should matter).. ive bled air out of lines for all 4 disk brakes..with truck not running pedal is firm but can still push to floor, if i start motor its not even firm just pushes to the floor with ease.. Any help with this?

question 2..on the brake booster above 1 assume the part the comes off prop valve is a brake switch but only has one wire, doesnt it need two to complete the circuit? if not a brake switch what could it be?

any help would be great