1997 GMC Sierra Fuel Pressure Regulator

Tiny
MARKH97GMC
  • MEMBER
  • 1997 GMC SIERRA
  • V8
  • 2WD
  • AUTOMATIC
  • 142,000 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?
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Tuesday, November 4th, 2008 AT 9:21 PM

3 Replies

Tiny
IMPALASS
  • EXPERT
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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Tuesday, November 4th, 2008 AT 9:43 PM
Tiny
MARKH97GMC
  • MEMBER
My truck is a C1500 with a 5.7 liter V8. The 8th digit of my VIN number is the letter R.
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Wednesday, November 5th, 2008 AT 12:03 AM
Tiny
IMPALASS
  • EXPERT
Hello

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.


http://www.2carpros.com/forum/automotive_pictures/248015_58885441_1.jpg




http://www.2carpros.com/forum/automotive_pictures/248015_2_18.gif




http://www.2carpros.com/forum/automotive_pictures/248015_3_15.jpg



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.
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Wednesday, November 5th, 2008 AT 6:29 AM

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