1998 gmc jimmy with P0152 code

Hi i have a 98 gmc jimmy 4wd {4.3} with about 150k miles on it but its been kept in great shape its triping a p1052 i took it to autozone and it said there was a problem in bank 2 sensor 1 ive changed all the o2 sensors the ignition coil plugs and wires and still no luck any suggestions
AZ does it again.
P0152 is the DTC for upstream, bank two, oxygen sensor. That is telling you that there is a problem in that system, not that the part is bad. The condition to set P0152 is, generally, due to overfueling. Check TPS and fuel pressure, then report back with findings. The Vortec injection system is known for leaky pressure regulators and fuel feed lines.