I have a 2003 trailblazer and about 4 weeks ago I put a lot of stove pellets in it and something happened I started to leak gas! I figured I most have put a hole in my tank from putting too much weight in it. So I pulled the gas tank and saw that one of the two elbows coming out of the pump was leaking. I ended up replacing the fuel pump but when I put the new one in the engine light came on and is blinking “service engine soon” and it seems that it’s sputtering a little. Brought it to autozone and had a code checker done the checker gave me a 307 code any ideas??