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Home >> GMC >> 1998 >> C3500 HD 6.5 F, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Mechanical - 4.3L V6, 5.0L, 5.7L & 7.4L V8 - VINS [W,X,M,R,J]) >> Removal & Installation >> Fuel Pressure Release

Fuel Pressure Release

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Disconnect negative battery cable. Loosen fuel tank cap to relieve tank pressure. Wrap a shop towel around fitting while connecting fuel gauge top avoid spillage. Connect one end of fuel gauge hose to pressure relief fitting on fuel rail. Place other end of hose in a container. Open relief valve to release pressure.