TrailBlazer 4WD L6-4.2L VIN S (2002)
Fuel Injector: Service and Repair
REMOVAL PROCEDURE
NOTE: Use care in removing the fuel injectors in order to prevent damage to the fuel injector electrical connector pins or the fuel injector nozzles.
Do not immerse the fuel injector in any type of cleaner. The fuel injector is an electrical component and may be damaged by this cleaning method.
IMPORTANT: The engine oil may be contaminated with fuel if the fuel injectors are leaking.
1. Remove the fuel rail assembly.
2. Disconnect the fuel injector harness connector from the fuel injectors.
3. Remove the injector retainer clip (1).
4. Remove the fuel injector (3) from the fuel rail.
5. Discard the injector retainer clip (1).
6. Remove the injector O-ring seals (2, 4) from both ends of the injector. Discard the O-ring seals.
INSTALLATION PROCEDURE
IMPORTANT: When ordering new fuel injectors, be sure to order the correct injector for the application being serviced.
The fuel injector assembly (1) is stamped with a part number identification (2). A tour digit build date code (3) indicates the month (4), day (5), year
(6), and the shift (7) that built the injector.
