CTS V6-3.2L VIN N (2003)
1. Apply a few drops of clean engine oil to the O-ring seals on the fuel pressure regulator.
2. Twist while pushing inward on the fuel pressure regulator, until fully seated against the fuel rail.
IMPORTANT: Be sure to locate the atmospheric vent toward the front of the engine on the fuel pressure regulator.
3. Position the clamp around both the fuel pressure regulator and the fuel rail.
4. Install the fuel pressure regulator clamp bolt.
NOTE: Refer to Fastener Notice in Service Precautions.
Tighten
Tighten the fuel pressure regulator clamp bolt to 5 N.m (44 lb in).
5. Install the atmospheric vent hose on to the fuel pressure regulator port.
6. Using the scan tool turn ON the fuel pump to pressurize the system.
7. Check for fuel leaks.
8. Install the air inlet grill.
