2024 Sierra Denali Evap Leak. Scotty kilmer, mechanic for the last 48 years, shows how you can fix the trouble code p0455 when the evap system has a large leak. 95k views 1 year ago.
The gmc sierra and yukon units included in the recall are affected by a brake fluid leak detection failure causing the system to fail to notify drivers of a leak, per info in. Any large leak in your evaporative emission control system, or evap system, can signal trouble code p0455.
