Colorado 4WD L5-3.5L VIN 6 (2005)
3. Disconnect the atmospheric vent hose (2) from the fuel pressure regulator (3).
4. Clean any dirt from the fuel pressure regulator (3) and the surrounding area.
5. Remove the fuel pressure regulator screws (4, 5).
6. Pull the fuel pressure regulator (3) and O-ring seal (2) from the fuel rail (1).Discard the O-ring seal (2).
7. Pull the fuel rail return pipe (6) and O-ring seal (7) from the fuel pressure regulator (3).Discard the O-ring seal (7).
8. Inspect the regulator filter screen for contamination. If contaminated, replace the fuel pressure regulator.
INSTALLATION PROCEDURE
1. Install the new fuel pressure regulator filter.
2. Lightly lubricate the O-ring seals (2, 7) with mineral oil GM P/N 9981704.
3. Install the new O-ring seals (2, 7) to the following:
-
The fuel pressure regulator (3)
-
The fuel rail return pipe (6)
4. Press the fuel rail return pipe (6) and O-ring seal (7) into the fuel pressure regulator (3).
5. Press the fuel pressure regulator (3) and O-ring seal (2) into the fuel rail (1).
