Why does the gas tank overflow on a 2005 chev Tahoe?

The gas tank on a 2005 Chevy Tahoe may overflow due to a malfunctioning fuel filler neck or vent system, which can prevent proper air escape during refueling. A clogged vent line or a faulty fuel cap can also create pressure buildup, leading to fuel spillage. Additionally, overfilling the tank can cause fuel to back up into the filler neck, resulting in overflow. Regular maintenance and inspection of the fuel system can help prevent these issues.