Hummer 12597567 Valve Assembly, Evap Emission Canister Purge Solenoid

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To remove the EVAP canister purge solenoid on a V6 model, start by removing the air intake duct and disconnecting the electrical connector and EVAP purge line quick-connect fitting from the solenoid. Then, remove the mounting nut and the solenoid itself. For a V8 model, follow the same steps but also cap both EVAP purge lines before disconnecting the inlet purge line quick-connect fitting. To remove the EVAP canister vent solenoid, disconnect the electrical connector and quick-connect fittings from the solenoid and remove it from its mounting bracket. To remove the EVAP canister, label and disconnect all EVAP hoses connected to it, remove the mounting nut, and remove the canister from its bracket. Finally, to remove the fuel tank pressure sensor, remove the fuel tank and the sensor from the fuel pump/fuel level sending unit mounting flange. Installation for all components is the reverse of removal.

To remove the EVAP canister purge solenoid, turn off the ignition and locate the solenoid. Disconnect the electrical connector and purge line fittings, and cap the lines. Remove the mounting bracket bolt and separate the solenoid. For the vent solenoid, raise the vehicle's rear and disconnect the electrical connector. Remove the mounting bolt, lower the canister, and rotate the solenoid counterclockwise to remove. To remove the EVAP canister, disconnect the hoses. For the fuel tank pressure sensor, raise the vehicle, remove the fuel tank, and disconnect the sensor's electrical connector. Pry under the sensor to remove it. Installation is the reverse of removal.

Fuel evaporative emissions control (EVAP) system is the system responsible for managing the fuel vapors from the fuel tank, and releases them into engine intake during engine operation. Key elements of this system include a canister which has activated charcoal that absorbs fuel vapors, purge valve, vent valve, fuel tank pressure sensor, fuel tank, and various vapor lines and purge lines. After going through a check valve, the fuel tank vapor goes to a charcoal canister where it is absorbed and stored by the charcoal.There are certain conditions under which PCM (Powertrain Control Module) will open both the purge and vent valves resulting in drawing of fuel vapors from canister into manifold for combustion within the intake manifold.The PCM regulates vapor flow rate through EVAP purge valve control solenoid by cycling it on and off so as to optimize purge based on engine conditions. During cold start-up mode of operation, this system self-diagnoses by creating vacuum in EVAP system to detect leaks while PCM monitors the voltage of Fuel Tank Pressure Sensor.The Fuel Tank Pressure Sensor supplies MAP sensor like signal voltage to PCM representing air pressure within the fuel tank. Replacement procedures usually entail disconnecting quick connect fittings then cleaning area before removing mounting bolts; hoses; electrical connectors etc. Specific removal and installation procedure for replacing EVAP canister, purge valve, vent valve and fuel tank pressure sensor.This is because there is an EPA-mandated warranty that covers this evaporative emission control system.

Use a small screwdriver to depress the retaining clip on the backside of the vent solenoid valve and slide the valve off of the bracket.

When the pressure of the trapped vapors reaches a threshold, they are routed through valves to the EVAP canister for temporary storage.

Start by removing the engine cover. Then, disconnect the electrical connector from the valve and disconnect the hose. Next, unscrew the bolt and remove the purge valve from the upper intake manifold.

Installation is the reverse of removal for all components.

The valve sits on top of the rear intake manifold part, requiring the removal of an engine cover, disconnecting the electrical connector, and lines for removal and installation.

To remove the EVAP canister purge solenoid on a V8 model, follow the same steps as for a V6 model. Additionally, make sure to cap both EVAP purge lines before disconnecting the inlet purge line quick-connect fitting.

It is located behind the left rear wheel well and can be accessed by raising and securing the vehicle, disconnecting the electrical connector and hoses, and sliding the solenoid up for removal and reinstallation.

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.

The components of the EVAP system include the canister, purge valve, vent valve, fuel tank pressure sensor, fuel tank, and vapor and purge lines.

To remove the EVAP canister purge solenoid on a V8 model, follow the same steps as for a V6 model. Additionally, make sure to cap both EVAP purge lines before disconnecting the inlet purge line quick-connect fitting.

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.

This solenoid is located under the intake manifold on the drivers side

On a 2008 Colorado this solenoid is found by the drivers side intake manifold