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Fuel Pressure Release Procedure

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Suburban, and 2003 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect negative battery cable.
  2. Remove fuel injector sight shield.
  3. Loosen fuel filler cap in order to relieve fuel tank vapor pressure.
  4. Connect Fuel Pressure Gauge (J-34730-1A) to fuel pressure valve. Wrap a shop towel around the fitting while connecting gauge in order to avoid spillage.
  5. Install gauge bleed hose into an approved container.
  6. Open valve on the gauge to bleed system pressure. The fuel connections are now safe for servicing.
  7. Drain any fuel remaining in the fuel pressure gauge into an approved container.
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