K 1500 Truck 4WD V8-6.5L DSL Turbo VIN S (1999)
Fuel Filter: Description and Operation
Fuel Manager/Filter
The fuel manager/filter is an in-line type filter which combines several different functions. It acts as a fuel filter, water separator, water detector, water
drain, and a fuel heater.
The fuel manager/filter mounts on the rear of the intake manifold. The filter housing has an inlet fitting connecting to the pipe/hose from the lift pump
and an outlet fitting connecting to the fuel injection pump with a hose. A third fitting connects through a hose to a drain valve mounted on the water
crossover/thermostat housing.
The fuel manager/filter has a replaceable element. The element has an air vent valve on its top surface that is used during lift pump diagnosis and filter
element replacement procedure. The fuel manager/filter also has a water in fuel sensor and a fuel heater.
