Big win with EVAP system

[wheats]

Hope this helps someone. 2008 5.3 here. So after replacing canister, both solenoids purge valves and dropping the tank to blow out the lines I still had the CEL. I started checking fuses under the hood and noticed a square fuse/relay missing its top clear cover. #72 “left bussed electrical center 2”. I replaced it and CEL shut off. If someone could please confirm this fuse/relay linked to the EVAP system would be appreciated. Thanks.

 

[Joseph Garcia]

Welcome to the Forum from NH.

Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.

I hope that you will become a participating member in the Forum's discussions.

Pics of the truck, please.

I cannot personally assist you with your issue, but other members of this Forum much more knowledgeable than me in this area will chime in.

@Doubeleive @OR VietVet @wjburken

 

[Doubeleive]

Hope this helps someone. 2008 5.3 here. So after replacing canister, both solenoids purge valves and dropping the tank to blow out the lines I still had the CEL. I started checking fuses under the hood and noticed a square fuse/relay missing its top clear cover. #72 “left bussed electrical center 2”. I replaced it and CEL shut off. If someone could please confirm this fuse/relay linked to the EVAP system would be appreciated. Thanks.

you could check the gm upfitter guide, they have decent electrical diagrams free