2007 GMC Acadia P0499 Fault: How to Locate Vent Valve Solenoid and Fix Remote Start Issue

I'm experiencing a P0499 diagnostic code on my 2007 GMC Acadia. The check engine light is on, which has disabled my remote start functionality—something I rely on during winter months. I'm looking for guidance on locating the vent valve solenoid, as some vehicles require dropping the spare tire to access it. I've heard that the solenoid might be located beneath the trunk floor or inside the fuel tank area. Could someone confirm the exact location and provide troubleshooting steps? Additionally, I want to understand whether clearing the code temporarily allows remote start to function again—only for a short period before the light returns. Potential causes of P0499 include: - Faulty vent valve solenoid - Wiring or circuit issues - PCM/ECM fault I've also checked the 10-amp fuse under the instrument panel (IP) labeled 'canister vent'—it appears intact. However, I'm still unable to use remote start without clearing the code with a scanner, and it reactivates within seconds after. Any advice on diagnosing or repairing this issue would be greatly appreciated.