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I know that on a '96 the fuel filter is an in-line type near the fuel tank. As Pontiac hasn't really altered much on the Sunfire in over ten years, I'd suggest starting there.
Near the gas tank. It's an in-line filter.
Usually right above and in line with the crankshaft pulley
Look under the vehicle - follow the fuel line from the tankRemove clamps and support to replace
on the right side of the car, looking at it from the rear, underneath the care on the fuel line running into the gas tank.
I've never had to change mine, but it's an in-line filter located near the gas tank.
5/16 Flexible steel tubing.
Look under vehicle--follow fuel line from tank
On the rightside of the car. The low pressure line with the blue cap.
Refrigerant is added to a 1997 Pontiac Sunfire by removing the safety cap on the low pressure cooling line at the rear of the engine compartment. The charging line is then hooked up and refrigerant added until the pressure reaches specified levels.
Have you checked the power steering pressure line?
Look under the vehicle along fram - follow the fuel line from the tank