Fuel Injector (A), Part Number (B), Build Date Code (C), Month (D), Day (E), Year (F), Shift (G) - Chevrolet Trailblazer Service Manual

1. Remove the fuel rail assembly from the cylinder head.
2. Disconnect the fuel injector connectors.
3. Remove and discard the fuel injector retainer clips from the fuel injectors
4. Remove the fuel injectors from the fuel rail.
5. Remove and discard the fuel injector o-ring seals.
To Install:
Fuel injector (A), Part number (B), Build date code (C),
NOTE: Use the correct part number when ordering new fuel injectors.
1. Use clean engine oil to lubricate the new o-ring seals.
2. Install new fuel injector o-ring seals to the fuel injectors.
3. Install new retainer clips to the fuel injectors.
4. Install the fuel injectors into the fuel rail.
5. Connect the fuel injector connectors.
6. Install the fuel rail assembly to the cylinder head.
5.3L & 6.0L Engines
Month (D), Day (E), Year (F), Shift (G)