Tank Assembly problems of the 2004 Buick Rainier

Fuel tank is leaking at the filler inlet. This same problem was covered under a recall on chevy trailblazer ext's which share many of the same components. There is a smell of fuel in my garage and it is clearly visible on my garage floor. Why wouldn't gm cover all vehicles of the same build and not just the trailblazer? I am afraid my car will catch fire overnight or while my wife and toddler are inside it.

2004 Buick Rainier with 97,000 miles and no history of accident, damage or service issues passed state of arizona emissions test in December 2009, including evaporation testing. Within a couple of weeks a check engine light came on and was diagnosed by code as an evaporation issue. On the way to the dealer service center the vehicle would not accept gas, instead the gas puddled under the vehicle and caused the pump to automatically shut off. The dealer diagnosed that there was a crack in the gas tank in the area of the gas filler neck. The dealer also confirmed there was no damage to the area. Dealer indicates that the gas tank and filler neck need to be replaced. No action has been taken yet.