Fuel System Cleaning

TOOLS REQUIRED: 

• 7000081-SAT3 Tech-2
• SA9127E-7 Fuel Flow/Pressure Adapter

After it is determined that the fuel system is contaminated, the following procedure to clean it is recommended:

1. Place vehicle on hoist and open hood.
   Fig 1: Placing Vehicle On Hoist

   Courtesy of GENERAL MOTORS CORP.
2. Disconnect negative battery cable.
3. Drain fuel tank. Refer to FUEL TANK DRAINING .
   Fig 2: Draining Fuel Tank

   Courtesy of GENERAL MOTORS CORP.
4. Remove fuel tank. Refer to FUEL TANK .
5. Disconnect fuel feed line at engine.
   Fig 3: Fuel Feed Line

   Courtesy of GENERAL MOTORS CORP.
6. With compressed air, blow out fuel feed line. Catch fuel in a container at opposite end of line.
7. Remove EVAP canister from fuel tank. Refer to EVAP CANISTER VENT SOLENOID .
8. Remove pump module. Refer to FUEL PUMP MODULE .
9. Inspect inlet filter on pump. If plugged or damaged, the entire fuel pump module must be replaced (not serviced separately).
10. Flush tank with hot water for at least six minutes; invert and drain. All metal chips/debris must be removed from the tank prior to installation.
11. Install EVAP canister to fuel tank.
12. Install fuel pump module to fuel tank but do not connect fuel feed line to new filter/regulator.
13. Install fuel tank to vehicle.
14. Install fuel filler pipe to vehicle.
    Fig 4: Fuel Filler Pipe

    Courtesy of GENERAL MOTORS CORP.