Removal (4.8L, 5.3L & 6.0L)
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Yukon, 2003 Chevrolet Tahoe, 2003 Chevrolet Suburban, and 2003 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Three styles of fuel pressure regulators and fuel rails are used in this model year. Each regulator has a different footprint that consequently changes the size of the receiving port on the fuel rail. The regulator retaining clips are specific to each fuel rail-regulator design and cannot be interchanged. See Fig 1.
- Disconnect negative battery cable. Loosen retaining bolt on intake manifold sight shield at top of engine. See Figure. Remove intake manifold sight shield from top of engine. Remove intake manifold sight shield retainer bolts. Remove intake manifold sight shield retainer.
- Release fuel pressure. See FUEL SYSTEM PRESSURE RELEASE . Before removal, clean area surrounding fuel pressure regulator with a spray type engine cleaner, such as GM X-30A. DO NOT use any solvent that contains Methyl Ethyl Ketone (MEK). Solvents containing MEK may damage fuel system components.
- Disconnect the fuel pressure regulator vacuum line. Remove the fuel pressure regulator retainer. See Fig 2. Remove the fuel pressure regulator. Ensure fuel pressure regulator filter, back-up ring and "O" rings are not still in the fuel rail.