1997 GMC Sierra Repair Question
Topics covered: Fuel pressure, Engine, Fuel pressure regulator.
Mileage: No information provided.
Mileage: No information provided.
Asked on November 4, 2008
1997 GMC Sierra Fuel Pressure Regulator
Engine Mechanical problem
1997 GMC Sierra V8 Two Wheel Drive Automatic 142000 miles
Hi, I'm about ready to change the fuel pressure regulator. In my chilton repair manual it says that there is a vacuum line connected to the fuel pressure regulator, but there wasn't a vacuum line connected to it when I pulled the upper plastic manifold cover off. Is a vacuum line supposed to connect to the fuel pressure regulator on this vortec 350?
1997 GMC Sierra V8 Two Wheel Drive Automatic 142000 miles
Hi, I'm about ready to change the fuel pressure regulator. In my chilton repair manual it says that there is a vacuum line connected to the fuel pressure regulator, but there wasn't a vacuum line connected to it when I pulled the upper plastic manifold cover off. Is a vacuum line supposed to connect to the fuel pressure regulator on this vortec 350?
Asked by markh97gmcAnswer
Replied on November 4, 2008
Hello – I need more specifics on your vehicle to better assist you – is it a C1500 or C2500 or ??? What are the exact Liter size of your engine and the 8th digit of your VIN.
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Replied on November 5, 2008
My truck is a C1500 with a 5.7 liter V8. The 8th digit of my VIN number is the letter R.
Replied on November 5, 2008
Hello – sorry you are having problems with your vehicle.
According to the attached information – as you see, yes a vacuum hose is supposed to be connected. You can see the hose hook up on the attached diagrams. Also, I attached the directions and it states the same.
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REMOVAL PROCEDURE
Disconnect the negative battery cable.
Relieve fuel system pressure. Refer to Fuel Pressure Release Procedure .
Remove the upper manifold assembly. Refer to Engine Mechanical .
DISASSEMBLE PROCEDURE
Disassemble the fuel pressure regulator snap ring retainer.
Disassemble the regulator assembly and the O-rings.
Discard the O-rings. NOTE : If the fuel pressure regulator is to be reinstalled, inspect the filter screen (if equipped) for contamination. If contaminated, remove. Discard the filter screen.
ASSEMBLE PROCEDURE
Lubricate the new O-rings with clean engine oil.
Install as an assembly, backup O-ring, large O-ring, filter and small O-ring.
Assemble the regulator with vacuum tube pointing down and snap ring retainer.
INSTALLATION PROCEDURE
Install the upper manifold assembly. Refer to Engine Mechanical .
Disconnect the negative battery cable.