Greetings. I'm new to the forum. I have a 02 Z28. My service engine light came on. I scanned it and it came back with the tank pressure sensor code. I replaced the fuel pump and sensor. The light is still on. I reset and erased all codes. It only took a few minutes for it to come back on. What would be my next step? Any advice would be appreciated.

 

sounds like evap is not working right, could be relief valve or pressure control valve is failing.