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In the tank
outside of tank.located in front of tank
my owners manual for my 1993 says that it has a 20 gallon tank.
its above the serpentine belt on the lefth hand side of the engine
Look under the vehicle along the frame rail follow the fuel line from the tank
If there is not an access hole in the rear trunk type area you will havfe to remove fuel tank to access
In the fuel tank
you probably mean the the over flow bottle. that is located on the drivers side front engine compartment on the very top.
When filling an empty gas tank needs to be filled, it is important to know the tank size. The size of 2009 Pontiac grand prix gas tank is 17.5 gallons.
When buying a car it is important to look into the size of its gas tank. The gas tank size of a Pontiac g6 holds 16.4 gallons.
about 18 gal tank
20 gallon