2015 GMC Acadia
Mileage
129,012
Service Date
2/14/2026
Services Performed
- Connected a scan tool and found code P0496 – Evaporative Emission System High Purge Flow. With the scan tool connected, performed an on board evaporative emission (EVAP) system leakage test and found the system did not go into negative pressure. Connected a smoke machine to the EVAP system, performed a smoke test with the smoke machine, and found no apparent external smoke leakage. Removed the vacuum supply hose from the EVAP purge solenoid valve fitting and found smoke leaking from the fitting. Disconnected the connector from the EVAP purge solenoid valve and smoke continued to leak from the fitting. Used a multi-meter and measured the specified 12 Volts and 0.10 Volt or less ground at the connector with solenoid energized with the scan tool and found voltage and ground were present. Removed the EVAP purge solenoid valve, used a set of fused jumper wires, applied 12 Volts and ground to the solenoid while applying vacuum with a hand held vacuum pump. With the valve energized or not energized the valve did not hold a vacuum indicating the EVAP purge solenoid valve was faulty. The results of these tests verified the EVAP purge solenoid valve was faulty.
- EVAPORATIVE CANISTER PURGE SOLENOID – Remove & Replace
ERIC S. gave our service a 5 star review on 2/14/2026
