K 2500 Truck 4WD V8-6.6L DSL Turbo VIN 1 (2002)
Diesel MFI Pump: Description and Operation
Fuel Balance Pump
AUXILIARY FUEL PUMP (BALANCE)
On vehicles equipped with dual fuel tanks, an electric fuel pump is located on the left frame rail. This fuel pump is powered by the fuel pump relay
that is controlled by the ECM. Fuel is transferred from the auxiliary fuel tank to the primary fuel tank in order to ensure all of the usable fuel volume is
available to the fuel injection pump.
