Hello, I have an 03 Z71 with 99k miles on it. I was getting codes P0430, P0300, P0101 and loss of power. I replaced both O2 sensors for bank 2 as the code said. I cleaned the MAF, looked good. Reset the codes and ran the engine. Got rid of them all other than the P0300. Replaced spark plugs and wires, cleared codes, test drove and now I?m getting codes C0265, C0291, C0223 along with very rough idle and flashing check engine light. Can these issues cause the engine to run rough? I?m at a loss. I tried to search everything I could but couldn?t find an answer.