Sierra 2500 4WD V8-6.6L DSL Turbo VIN 2 (2004)
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Fuel Line Coupler: Description and Operation
QUICK-CONNECT FITTINGS
Quick-connect fittings provide a simplified means of installing and connecting fuel system components. The fittings consist of a unique female connector
and a compatible male pipe end. O-rings, located inside the female connector, provide the fuel seal. Integral locking tabs inside the female connector
hold the fittings together.