This 2018 Chevy Traverse has a check engine light indicating code P0455, which means a large EVAP leak. I initially checked for obvious leaks but found none, so I used a smoke machine to detect emissions leaks. I didn't see any leaks up front, but I found a big leak in the rear of the vehicle right by the gas cap, suggesting a possible issue with the charcoal canister or an emission line. I'll need to raise the vehicle to investigate further, as something may have struck it on the road. At least

6 Symptoms of a Bad Timing Chain (and Replacement Cost in 2026)

12 Most Common Problems With Chevy Traverse: Issues Explained

Timing chain replacement

Chevy Traverse P0496 Trouble Code Diagnostic OBDII | Drivetrain Resource

Chevrolet Traverse Warning Lights [2008-2024] | WarningLights.co

Chevy Traverse bad O2 sensor symptoms, causes, and diagnosis