2004 Chevrolet Trailblazer Q&A

2004 Chevrolet Trailblazer Question: cylinder #4 misfires, and the code says low coolant as well as O2 sensor

I have MULTIPLE DRIVEABILITY SYMPTOMS of CHUGGLE, ROUGH IDLE AND LIGHT OR INTERMITTENT MISFIRE. It feels like the engine is stalling, but it doesn't. also when i ascend up a hill it feels rougher than when i am going down. -
Answer 1
What are the code numbers please? I assume one code is P0304 what are the others. -