Went to put gas in my car. Half a gallon went into the filler tube, half a gallon poured on my shoe and the side of the car. Called off work (AGAIN!), drove down to my mechanic. Luckily I made it down without running out of gas. After plugging into the computer he found that according to the computer that I had rolled the vehicle and the car sealed the gas tank. Sensor on the gas tank had gone bad (Big Surprise) and he had to replace the filler tube because GM in there infinite wisdom made it so you can't un seal the unit. You have to replace it. By the way, the sensor is on TOP of the gas tank. SO it has to be dropped to replace it.