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Learn to diagnose and locate a small EVAP (Evaporative Emission Control) system leak on a 2018 GMC Sierra 1500 pickup truck through hands-on automotive repair demonstration. Follow along as a professional mechanic tackles a real customer vehicle presenting with an illuminated check engine light and uses diagnostic scan tools to identify the specific EVAP leak code. Master the smoke testing technique using an Avoca smoke machine to visually trace vapor leaks throughout the vehicle's emission control system. Observe proper diagnostic procedures, safety protocols, and troubleshooting methods used in professional automotive repair shops when dealing with emission system faults. Gain practical insights into reading diagnostic trouble codes, interpreting scan tool data, and applying systematic approaches to isolate hard-to-find leaks in modern truck emission systems.
