Review on 🔧 High-Quality Gas Cap Replacement GT231, 15763227 for Chevy GMC Cadillac Oldsmobile Pontiac - Perfect fit for 1999-2003 Silverado Sierra, 2000-2003 Suburban Tahoe Yukon, 2002-2003 Escalade Avalanche, and more by John Miller

My vaporizer code has been corrected. "Code P0442 indicates a very small leak in the fuel tank evaporative system and its venting system. A gas cap leak is the most common cause of this code, and there is no way it can damage the gas cap or the lip where it seals the tank. Checking the system for leaks can be done with a smoke machine that can detect leaks and then repairs can be made.” A smoke machine and scan tool with an actuator test for the purge valve, the exhaust valve and the fuel/tank pressure option in real time are essential if you want to diagnose yourself.