GM and GMC
Fuel Filters

How do you replace the fuel filter located on a 2003 GMC half ton 4wd truck?

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2011-09-12 20:57:25
2011-09-12 20:57:25

take it to a Chevy dealership & pay $773.00 like im having to do right now

Wrong! For one thing no dealer will charge much at all to simply replace the fuel filter. Do it yourself, and it will save you money. It is normally located along the driver's side frame rail, inboard side between the back to the driver's door and the fuel tank. It looks kind of like a small tin can with the fuel line attaching at the rear and front of the unit. It may be somewhat rusty or dirty after a few years on the vehicle. I suggest looking for it and once you find it, spray a small amount of penetrating oil on the threads of the fuel line connectors the day before you plan on removing it. Then, simply turn the line fittings with a tight fitting wrench or line wrench so you don't round the corners off the fittings. The back fitting into the filter turns upward (counter clockwise) and the front turns downward (still counter clockwise) to remove the old one. There is a plastic band around the filter holding it in against the frame. Unsnap the band and it is removed. Have a rag or paper towel standing by as it may drip a little gasoline. Then dispose of them in your trash can after shaking any fuel out in a safe and proper place. The fittings do not require sealant as they are compression fittings like the vehicle's brake lines. The new filter is marked with an arrow for the direction of fuel flow. I own a 2003 GMC Sierra Crew Cab which is the same generation truck as yours.

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