Brake pedal comes back slowly

[Kingbarber340]

Hey there I’m kinda new to GM and I have a 2008 Tahoe I love/hate. So one day I’m driving and all of a sudden the grinding brake noise hit me. By the time I check it was already too late to save the rotor. So I change all 4 rotor and calipers just cause. Now I traditional bleeding and bleeding via scanner. Now I have no brakes at all after taking back the first set of calipers and a crap ton of Brake fluid IM LOSING MY **** !!! PLEASE someone help me get kill this gremlin

 

[Fless]

FWIW check the calipers to be sure they're on the correct side. Bleeder screws on top. Pic of an installed caliper, showing the bleeder?