Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 136 (ENGINE CONTROLS - REMOVAL, OVERHAUL & INSTALLATION - EXCEPT DIESEL)FUEL SYSTEMSFUEL PRESSURE REGULATORINSTALLATION
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Fuel Pressure Regulator: Installation
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Installation
WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Lubricate NEW "O" rings with clean engine oil. Install back-up ring, upper "O" ring, filter and lower "O" ring. See Figure. Install fuel pressure regulator with vacuum tube pointing down toward retaining clip.
- Install fuel pressure regulator retaining clip. Install upper intake manifold. See INTAKE MANIFOLD . Tighten all nuts and bolts to specification. See TORQUE SPECIFICATIONS . Connect negative battery cable.
- Turn ignition switch to ON position for 2 seconds. Turn ignition switch to OFF position for 10 seconds. Turn ignition switch to ON position. Check for fuel leaks. Repair as necessary.
NOTE:
If reusing fuel pressure regulator, inspect filter screen for contamination. If filter screen is contaminated, replace fuel pressure regulator.
- Install back-up ring, "O" ring, fuel pressure regulator filter and remaining "O" ring onto the fuel pressure regulator. Lubricate the fuel pressure regulator "O" rings with clean engine oil. Install the fuel pressure regulator.
- Install NEW fuel pressure regulator retainer. Connect fuel pressure regulator vacuum line. To complete installation, reverse removal procedure.
- Turn ignition switch to ON position for 2 seconds. Turn ignition switch to OFF position for 10 seconds. Turn ignition switch to ON position. Check for fuel leaks. Repair as necessary. Tighten intake manifold sight shield bolt and intake manifold sight shield retainer bolts to specification. See TORQUE SPECIFICATIONS .
- Install back-up ring onto fuel pressure regulator, followed by the large "O" ring, fuel pressure regulator filter and small "O" ring. See Figure. Lubricate large and small fuel pressure regulator "O" rings with clean engine oil.
- Push fuel pressure regulator into fuel pressure regulator housing on fuel rail. Install a NEW fuel pressure regulator retainer. Connect fuel pressure regulator vacuum line. To complete installation, reverse removal procedure.
- Turn ignition switch to ON position for 2 seconds. Turn ignition switch to OFF position for 10 seconds. Turn ignition switch to ON position. Check for fuel leaks. Repair as necessary. Tighten intake manifold sight shield retaining bolt to specification. See TORQUE SPECIFICATIONS .
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.