Fuel Pressure Relief Valve Replacement for GMC Truck TopKick C-Series (Conventional) C4/C5 2007

1. Open the hood.
2. Remove the glow plug module and bracket. Refer to Glow Plug Control Module Replacement .



3. Remove the fuel pressure relief valve from the left fuel rail.

Notice: Refer to Fastener Notice in the Preface section.




1. Install the fuel pressure relief valve to the left fuel rail.

Tighten
Tighten the fuel pressure relief valve to 100 N·m (74 lb ft).

2. Install the glow plug module and bracket. Refer to Glow Plug Control Module Replacement .
3. Prime the fuel system. Refer to Fuel System Priming .
4. Start the engine.

If the engine does not start, repeat the above step.

5. Inspect the fuel system for fuel leaks.
6. Close the hood.