No brake pedal pressure

I have a 2001 Silverado, 5.3 4wd, has had all new pads and rotors all the way around (4wheel disc) and new calipers on the front, also just had two brake lines replaced and bled by a shop a few months ago. Was pulling into the parking lot at a gas station when I went to stop and it felt like the ABS was stopping the pedal from going down so I stomped it so I didn’t hit the parking pylons and now my brake pedal has almost no pressure until it bottoms out, then the brakes kick in, I’ve checked underneath and see no leaks or drips. Is this a common issue? And how do I fix it?