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HOMESERVICE MANUALSCHEVROLET2001SUBURBAN C1500REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 21 (ENGINE CONTROLS - 4.3L - REPAIR INSTRUCTIONS)REPAIR INSTRUCTIONSFUEL PRESSURE RELIEF
2001 Chevrolet Suburban C1500

Fuel Pressure Relief

2001 Chevrolet Suburban C1500SECTION Fuel Pressure Relief
WARNING: This page is about a different car, the 2001 GMC Sierra and 2001 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Tools Required 

J 34730-1A Fuel Pressure Gauge

CAUTION:

Remove the fuel tank cap and relieve the fuel system pressure before servicing the fuel system in order to reduce the risk of personal injury. After you relieve the fuel system pressure, a small amount of fuel may be released when servicing the fuel lines, the fuel injection pump, or the connections. In order to reduce the risk of personal injury, cover the fuel system components with a shop towel before disconnection. This will catch any fuel that may leak out. Place the towel in an approved container when the disconnection is complete.

    Fig 1: Identifying Fuel Pressure Gauge
    GM180378Courtesy of GENERAL MOTORS COMPANY
  1. Disconnect the negative battery cable in order to avoid possible fuel discharge if an accidental attempt is made to start the engine. Refer to Battery Negative Cable Disconnection and Connection (Auxiliary Battery) , Battery Negative Cable Disconnection and Connection (Single Battery) in Engine Electrical.
  2. Loosen the fuel filler cap in order to relieve the fuel tank vapor pressure.
  3. Connect the J 34730-1A or the equivalent to the fuel pressure connection.
  4. Wrap a shop towel around the fitting while connecting the gauge in order to avoid spillage.
  5. Install the bleed hose of the gauge into an approved container.
  6. Open the valve on the gauge in order to bleed the system pressure. The fuel connections are now safe for servicing.
  7. Drain any fuel remaining in the gauge into an approved container.
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.