How to Replace the Fuel Pressure Regulator on a 2003 Suburban
- 1). Remove the cable from the negative battery terminal with a socket wrench to ensure that you don't start the engine inadvertently. Loosen the filler cap for the fuel tank to relieve the pressure in the fuel tank.
- 2). Wrap a shop rag around the fuel pressure fitting on the fuel rail. Attach a fuel pressure gauge to the fitting and place the bleed hose for the pressure gauge into a container approved for storing gasoline. Open the pressure gauge valve and allow the fuel to drain into the container. Detach the fuel pressure gauge from the fuel pressure fitting.
- 3). Disconnect the bolts on the upper manifold assembly with a socket wrench. Remove the upper manifold from the engine block. Detach the vacuum tube from the fuel pressure regulator.
- 4). Release the snap ring retainer around fuel pressure regulator and remove the fuel pressure regulator assembly from the retainer. Discard the O-rings and fuel filter.
- 5). Lubricate the new O-rings with engine oil and mount them onto the fuel pressure regulator. Install the fuel pressure regulator into its retainer and engage the snap ring around the fuel pressure regulator.
- 6). Connect the vacuum tube to the fuel pressure regulator. Attach the upper manifold assembly with the mounting bolts by using a socket wrench. Reconnect the negative battery cable.
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