Sierra 1500 2WD V6-4.3L (2008)
Fuel Injector: Procedures
Fuel Injector Cleaning
Tools Required
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J 38500-A Fuel Injector Cleaner
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J 39021 Fuel Injector Coil and Balance Tester
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J 39021-210 Injector Tester Adapter Box
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J 39021-301 V6 Fuel Injector Test Adapter
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J 41413 EVAP Pressure and Purge Station
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J 44466-10 Regulator and Hose Assembly
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J 44466-11 IAFM Fuel Transfer Tube Recycling Block
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J 44466-12 CSFI Fuel Metering Body Jumper Block
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J 44466-13 Screws
1. Loosen the fuel fill cap to relieve vapor pressure in the fuel tank.
2. Relieve the fuel system pressure.
3. Remove the positive crankcase ventilation (PCV) clean air tube from air inlet duct and set aside.
4. Remove the resonator and air inlet duct from throttle body.
5. Remove the brake booster vacuum hose and connector from intake manifold.
6. Remove the electrical connector from the central sequential fuel injection (CSFI) fuel metering body.
7. Remove the spark plug wires from 1, 3 and 5 from the distributor cap.
8. Remove the fuel feed pipe bracket stud (3).
9. Remove the fuel pipe retainer nuts (2) and retainer (1).
10. Remove fuel feed pipe (4).
Important: Make sure that the fuel pipe O-rings, washers, and spacers are present and in their proper position.
