K 3500 Truck 4WD V8-6.5L DSL Turbo VIN S (1999)
4.
Remove and discard the indicator ring (factory use only) from the male fitting.
5.
Install a NEW retainer fitting into the female fitting.
6.
Connect the fittings together until a snap is heard and/or felt signifying the retainer tabs have engaged the raised feature of the male fitting.