Why is gas smell coming through heart? - 1995 Ford Contour

The fuel tank and lines are under the back seat. Seems to be a known issue.

https://www.google.com/search?q=2006+Saturn+VUE+fuel+line+routing

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Check pipe that connects the fuel filler inlet to the gas tank. Rubber connection at tank can deteriorate
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Yes, if the gas smell comes from the engine compartment.

I would check the fuel pressure regulator

For the first problem, if you can get me the codes I may be able to help you figure out the problem with the gas smell. The fuel gauge problem could be the gauge on the dash or the sending unit in the tank.
You should have the body computer scanned for trouble codes to find out whats going on with the ABS and traction control.
I have no clue on the humming noise.

heater core

you HAVE a gas leak, the best way for this problem is to use your senses of smell and sight.
Look for gas leaking at the same time smell for the strong smell of gas and locate the area.

it could be your head gaskets and thermostat going bad. those have to be fixed or your car will overheat and will cost tons of money to fixed...just went through the same thing

hmmm shaking may be a tune up issue and as far as the gas smell goes i would take it to the dealersdhip and have them diagnose it

I have a 2003 Nissan Frontier, i had the same problem last month with heavy gas smell coming from the back end of the truck. I took it into the shop and they did a Diagnostic Test and found that the Evap Canister...now they've changed it..no gas smell... Try this and Good Luck...

Kbua-Hawaii