GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2001 🢒 Yukon XL - 4WD 🢒 Engine 🢒 Engine Controls - 8.1L 🢒 Fuel Pressure Service Valve Replacement

Removal Procedure
  1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief .

    2. Object Number: 705539 Size: SH
  2. Clean the area around the fuel pressure connection with GM X-30A or equivalent.
  3. Remove the fuel pressure connection core (2) using a standard valve core removal and installation tool.

Installation Procedure

    Object Number: 705539 Size: SH
  1. Install the fuel pressure connection core assembly (2) using a standard valve core removal and installation tool.
  2. Tighten the fuel filler cap.
  3. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  4. Inspect for leaks using the following procedure:
    5. 4.1. Turn ON the ignition, with the engine OFF for 2 seconds.
    4.2. Turn OFF the ignition for 10 seconds.
    4.3. Turn ON the ignition, with the engine OFF.
    4.4. Inspect for fuel leaks.
  5. Install the fuel pressure connection valve cap (1).

    6. Object Number: 665445 Size: SH
  6. Install the fuel injector sight shield.