GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2008 🢒 TopKick C-Series (Conventional) C4/C5 🢒 Engine 🢒 Engine Controls and Fuel - 7.8L (LF8) 🢒 Fuel Pressure Regulator Replacement

Removal Procedure
  1. Remove the air cleaner layer. Refer to Air Cleaner Assembly Replacement .
  2. Disconnect the negative battery cable at the battery. Refer to Battery Negative Cable Disconnection and Connection .
  3. Remove the air breather hose (6) from the cylinder head cover.

    4. Object Number: 1400956 Size: SH
  4. Remove the fuel injection pipe  (3).
  5. Use a deep socket to remove the pressure limiter. Discard the pressure limiter and gasket.

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1400956 Size: SH
  1. Install a NEW pressure limiter and gasket.

    2. Tighten
    Tighten the bolts/nuts to 172 N·m (127 lb ft).

  2. Install the injection pipe (3) to the fuel rail.

    3. Tighten
    Tighten the sleeve nuts to 44 N·m (32 lb ft).

  3. Install the air breather hose (6) to the cylinder head cover.
  4. Install the air cleaner layer. Refer to Air Cleaner Assembly Replacement .
  5. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .