Its hiding behind the license plate
There is no such thing as a 2009 Monte Carlo
It is on the driver's side frame just forward of the gas tank.
I had that problem on my 2003 Monte and all it took was replacing the gas cap. Cheapest place to start try it first. Good Luck
distributer cap, low octane gas, or spark plugs i would do the distributer cap first.
The fuel capacity of a 2000 Chevrolet Monte Carlo is 17 gallons.
See link.
My 72 Monte gets 15 mpg.
in the gas tank
~ 24 MPG
bad gas get octane booster
17.1
It's located in the gas tank.