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The 2009 Cadillac CTS has its fuel filter located inside the gas tank, situated at the rear left of the vehicle. Over time, car components will wear out, including the fuel filter which should be changed every 30,000 miles to ensure optimal performance and fuel efficiency. It is essential for the fuel to burn effectively to get the best mileage possible. To avoid issues, it's important to keep the gas tank well-maintained, as problems such as loosening, faulty control valves, gas leaks, and a stuck gas cap can arise if not promptly addressed.
In the 2009 Cadillac CTS, you can find the fuel filter inside the gas tank, towards the rear left side of the car.