| How-To

How To Release an LS Fuel Fitting

Douglas GladWriter, Photographer

There is really no trick to this. All you need is the correct tool and a way to release the fuel pressure in the system. The tools we used are from OEM that we found on AutoZonePro.com, where you can buy professional shop tools and have them sent to your local store for pickup. The part number is 27318, and it cost $50.

The first step is to disconnect the battery or fuel pump fuse and relieve the fuel pressure using the fuel rail service port on the end of the fuel rail. Wrap the port in a shop towel, unscrew the cap, and use a flathead screwdriver to press the fuel rail test port valve.

The kit has A/C, fuel, transmission, and several generic service tools included. We used the 3/8-inch fuel disconnect tool. It's the third green fitting from the left.

Our LS3 fuel fitting had a catch that required a flathead screwdriver to remove.

The tool fits over the fuel line and releases the tabs inside the fitting. Push the tool in then pull the fuel line, and it will disconnect.

Here is an inside shot of the tabs. The OEM tool pushes all four tabs at the same time and releases the fuel line. To reinstall, simply push the fuel line fitting back onto the fuel rail until you feel it click into place.