Hello there, hope you all having a great day. So I have a 2006 4.8 Silverado 1500. The check engine light came on so I went to go get it scanned and Code :P0446 came up and the “Tighten Gas Cap” would come up on the dash. I went on to replacing the gas cap (oem) and the vent valve solenoid. I swapped the vent valve solenoid twice cuz I thought the first one didn’t work cuz the check engine light kept on coming up, but even with the new one it keeps on still coming up.
Cam i get any suggestions/ideas to do next ?

 

https://chevroletforum.com/forum/199...-advice-99123/

 

Thank you man !!

 

If I were you I would also read https://www.700r4transmissionhq.com/...evy-silverado/. It could also be the canister purge valve, a cracked hose, etc.

Good Luck!

 

Yesh I just swapped that too, but yeah I’ll check for cracked hoses !