Inspection Procedure

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: DO NOT perform this procedure unless instructed by an Evaporative Emission (EVAP) diagnostic.

NOTE: Use EVAP Pressure/Purge Diagnostic Station (J-41413) in order to provide a clean, dry, low pressure gas source.

Turn ignition off. Remove EVAP canister purge solenoid. See EVAP CANISTER PURGE SOLENOID under MOTORS, RELAYS & SOLENOIDS. Lightly tap the EVAP canister purge solenoid on a clean, hard surface. Inspect for carbon particles exiting either of the vacuum ports. If no carbon particles are found, reinstall EVAP canister purge solenoid and perform CLEANING PROCEDURE .
If carbon particles are found during the inspection procedure, replace EVAP canister purge solenoid and perform CLEANING PROCEDURE . If you were instructed to replace the EVAP canister purge solenoid, and no carbon particles are found, return to the EVAP diagnostic procedure. DO NOT perform the CLEANING PROCEDURE .