If you are smelling gas, get underneath & follow the gas lines thoroughly from engine to the tank. On HHRs the gas line is prone to a leak above the wheels, if you live in snow & salt areas.
That corrodes the line especially where they have a coating it traps the salt etc.
2008 HHR Panel 2LT, purchased Aug 28, '09 to date. Great lil ride.
Currently studying the Gen 1 Terrain for a possible next ride.