Notice: 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: If the fuel injectors are found to be leaking, the engine oil may be contaminated with fuel.

1. Remove the fuel rail. Refer to Fuel Injection Fuel Rail Assembly Replacement .



2. Remove the fuel injector retaining clip (1).
3. Remove the fuel injector (3) from the fuel rail.
4. Remove the fuel injector upper O-ring (2).
5. Remove the fuel injector lower O-ring (4).

1. Install the fuel injector upper O-ring (2).
2. Install the fuel injector lower O-ring (4).
3. Lubricate the fuel injector upper O-ring (2) using GM P/N 12345616 (Canadian P/N 993182).
4. Install the fuel injector (3) to the fuel rail.
5. Install the fuel injector retaining clip (1).
6. Install the fuel rail. Refer to Fuel Injection Fuel Rail Assembly Replacement .