Home Tips & Tricks 2004 Chevrolet Express 3500 Powertrain Control Module (PCM) code P0455

2004 Chevrolet Express 3500 Powertrain Control Module (PCM) code P0455

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Download Vehicle Application: Customer Concern: Tests/Procedures: Potential Causes: 2004 Chevrolet Express 3500 6.0L, GAS Powertrain Control Module (PCM) code P0455. Not finding any evaporative leaks. Went through evaporative system test with a scan tool. Found that the evaporative purge solenoid on the intake manifold was clicking but not allowing vacuum through it. 1. Check the evaporative purge solenoid on the engine for vacuum in and out of it while the solenoid is activated with a scan tool, engine running. 2. Replace the evaporative canister purge solenoid. Evaporative Emission (EVAP) Canister Purge Solenoid