'Tighten Fuel Cap' creating a P0455 DTC

Discussion in 'General Tahoe/Yukon/Escalade Discussion Forum' started by hd_ryder, Sep 17, 2020.

  1. hd_ryder

    hd_ryder Member

    Likes Received:
    Sep 22, 2012
    2004-2006 Tahoe. Has anyone had a 'Tighten Fuel Cap' message that ends up creating a P0455 DTC, and tightening or replacing the cap does not correct the problem? Did you find your EVAP leak?
    So far I have replaced the Fuel Cap, vapor canister vent valve solenoid and attached hose, and vapor canister purge valve solenoid.