Hummer 12581282 Valve Assembly, Evap Emission Canister Purge Solenoid

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EVAP Purge Solenoid Valve Removal involves removing the engine cover, disconnecting the electrical connector from the valve, disconnecting the hose, unscrewing the bolt and removing the purge valve from the upper intake manifold. Installation is simply the reverse of removal. For EVAP Canister Removal, raise the vehicle and support it securely on jackstands. Then, disconnect the hoses from the canister, disconnect the electrical connector from the canister vent solenoid valve, remove the fasteners securing the canister, and remove the canister. Installation is again the reverse of removal.

Fuel vapors are collected from the fuel tank, throttle body, and intake manifold and stored in the canister during engine inactivity.

The EVAP system fuel tank pressure sensor, located on top of the fuel tank, monitors vapor pressure.

Raise the vehicle and support it securely on jackstands. Disconnect the hoses from the canister and disconnect the electrical connector from the canister vent solenoid valve. Remove the fasteners securing the canister and then remove the canister.

To remove the EVAP canister purge solenoid on a V6 model, start by removing the air intake duct. Then, disconnect the electrical connector and EVAP purge line quick-connect fitting from the solenoid. Finally, remove the mounting nut and the solenoid itself.

To remove the EVAP canister vent solenoid, start by disconnecting the electrical connector and quick-connect fittings from the solenoid. Then, remove it from its mounting bracket.