Tank Filler Pipe And Cap problems of the 2007 GMC Envoy

Stopped for fuel and turned off the motor. Filled tank until the pump automatically shut off. Replaced filler cap and tightened to spec. When I turned on the key, the gauges went through normal diagnostics. When I started the Envoy, the fuel gauge immediately went to empy, the low fuel light turned on, and a warning chime rang. While driving, the gauge would fluctuate, but never gave an accurate reading. Eventually, the check engine light also lit after about twenty miles. The next day, the fuel gauge appeared to work normally. However, since the first incident, this has happened with each subsequent fill-up.