Doubleseveneleven

Hello first time on here. I have a 06 gmc sierra 2wd WT 4.3. Was driving and it just died. Now it doesn't start. Just cranks and cranks and will back fire out of intake. I changed icm and did same thing. I changed cap and rotor wires and plugs. Same thing. They needed changed anyways. Tested codes. Have the following codes P00053 ho2 bank 1 sensor 1 P00054 ho2 bank 1 sensor 2 P00059 ho2 bank 2 sensor 1 P00060 ho2 bank 2 sensor 2 Also have P00449 which I think is gas cap. Did fuel pressure test and I get 54psi at check point when the engine is turning over. Also holds there really good/no fall off. Please help not sure what to do next Could it be doing this with just low fuel pressure?