Pontiac Aztek Questions - fuel filter location - CarGurus Pontiac Aztek with fuel problems people think it's in the lines it's usually in the plug that goes underneath where the back seat in front seat meets under the car there's pins get rotted out and that's what makes the problem unplug it and look at the pins Change Fuel Filter Pontiac Aztek « Wonder How To Change Fuel Filter Pontiac Aztek. How To : Change a Fuel Filter. Fuel filter replacement isn't as hard as it may seem. Learn how to change a fuel filter and make sure a fuel system is working properly with these car maintenance instructions. Video: . Part 1 of 14 - How to Change a fuel filter.