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.
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HOMESERVICE MANUALSGMC1995FORWARD CONTROL 4.3 Z, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 68 (ENGINE CONTROLS - REMOVE/INSTALL/OVERHAUL - 5.2L CNG)FUEL SYSTEMFUEL SYSTEM PURGINGNOTES
1995 GMC Forward Control 4.3 Z, Standard
Fuel System Purging: Notes
1995 GMC Forward Control 4.3 Z, StandardSECTION Notes
WARNING: This page is about a different car, the 1995 Dodge Ram Wagon, 1995 Dodge Ram Van, 1995 Dodge Pickup, and 1995 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
CNG fuel system is continuously under high pressure. Before servicing any CNG fuel system component, system must be purged of all natural gas.
Fuel system must first be purged of natural gas if any of following components are to be removed or repaired.
- Fuel Tube Or Fuel Tube Fitting
- Fuel Injector Rail Assembly
- Fuel Temperature Sensor
- Fuel Low-Pressure Sensor
- Fuel Gauge Pressure Sensor
- Fuel Fill Receptacle
- Fuel Cylinder
- Manual Shutoff Valve
- Fuel Filter
- Fuel Injectors
- Low-Pressure Fuel Shutoff Solenoid
- Fuel Pressure Regulator
- Fuel Fill Check Valves
- High-Pressure Fuel Shutoff Solenoid
RENDER: 1.0x
NO RELATED
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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.