Every time put gas in my 2003 Chevy impala goes on empty quick don't smell gas

you need to replace your switch the theft system is activated with the key maybe try putting the key close to where it goes

A 2003 Impala has a 3.4 or a 3.8 engine.
The fuel filter should be under the car in the fuel line between the tank and the engine.

Check under the hood on the side of the fuel rail, the fuel pressure regulator value, this is a common problem.

yea they are right right undo the hoses from the coolant container to to the radiator and the hose from the radiator to the engine and let it all drain out then put it back on and put some new radiator fluid in the radiator until ist full and then put some more in the container for extra make sure to put both hoses back on

Click this link below and follow the details,to troubleshoot the problem.:--

http://technoanswers.blogspot.in/2012/02/car-starting-issues.html

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Thanks.

"The car didn't overheat" you may have a blown head gasket, also if it sustained heat for a prolonged time , the head may have warped. Check coolant level.

All Vehicles do

I don't believe the rear is adjustable,
unless you install a kit to do so

So don't let anyone tell you that it can not
be adjusted

Go to an alignment only shop,no chain store place

sounds like your sending unit is bad. unfortunately the sending unit is probably with the fuel pump in the gas tank.

It definitely sounds like the fuel pressure valve located on the end of fuel rail on engine.Its about $50

Check the front passenger side carpet and make sure it is dry. If it is wet, the heater core up under the dash is leaking, which is why you smell it in the cab.