3500 4x4 Pickup L6-359 5.9L DSL Turbo (1996)
Rubber Fuel Hose, Pump To Heater
a. Remove the rubber fuel hose and clamps located between the fuel heater and fuel transfer pump.
Installing Hose Adapter
b. Install special hose adapter tool 6837 between the disconnected fittings on the heater and transfer pump. Install clamps to hose tool 6837.
Installing Vacuum Gauge
c. Connect vacuum gauge 6828 to T-fitting as shown.
d. Start the engine and observe the vacuum gauge. The vacuum gauge will not indicate a vacuum until the transfer pump begins to operate at full
capacity. Inlet restriction must not exceed 100 mm Hg (4 in. Hg). If the restriction is higher than the specifications, check for a kinked fuel
line or a plugged fuel tank vent. A partially clogged in-tank fuel filter can also cause excess vacuum. Repair as necessary.
8. Remove vacuum gauge and adapter hose tool.
9. Install rubber fuel hose and clamps between heater and pump.
