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 MANUALSGMC1996SAVANA SPECIAL 6.5 YREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 56 (ENGINE CONTROLS - REMOVE/INSTALL/OVERHAUL - 6.5L DIESEL.)FUEL SYSTEMPURGING WATER FROM FUEL SYSTEM
1996 GMC Savana Special 6.5 Y
Purging Water From Fuel System
1996 GMC Savana Special 6.5 YSECTION Purging Water From Fuel System
WARNING: This page does not describe the selected car, but rather 21 other vehicles, including the 1996 Chevrolet Chevy Van, 1995 GMC Yukon, 1995 GMC Vandura Special, 1995 GMC Vandura, and 1995 GMC Suburban. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect negative battery cable. Remove fuel filler cap. Place a hand operated pump into fuel filler neck and drain fuel from fuel tank. Reinstall fuel filler cap. Remove fuel tank and fuel sender. Replace fuel tank if internally rusted. Replace fuel strainer (as necessary).
- Remove fuel feed hose at fuel pump. Remove fuel return line at injection pump. Using low air pressure, blow out fuel lines toward rear of vehicle. Replace fuel lines if internally rusted. Remove F/SOL ("C" & "K" Series) or FPMP ("G" Series) fuse from fuse panel, or disconnect engine shutoff solenoid ("P" Series). Remove fuel manager/filter element.
- Install fuel sender and fuel tank. Install fuel feed hose to fuel pump. Fill fuel tank with diesel fuel until tank is 1/4 full. Install fuel filler cap. Connect negative battery cable. Crank engine for 15 seconds. Allow starter to cool down for one minute between cranking intervals. Use a suitable container to collect fuel. Repeat procedure until clear fuel is pumped out.
- Install NEW fuel filter element. Connect a hose from fuel injection pump return line to a closed metal container with a 2 gallon capacity. Crank engine for 15 seconds. Allow starter to cool down for one minute between cranking intervals. Repeat procedure until clear fuel is observed at fuel return line.
- Install fuse or connect solenoid. Crack open each injection line at each nozzle. Crank engine for 15 seconds. Allow starter to cool down for one minute between cranking intervals. Repeat procedure until clear fuel is observed at each nozzle Install injection line to nozzle fitting and tighten to 18 ft. lbs. (25 N.m).
- Start engine and idle for 15 minutes. Ensure fuel return line is in metal container and that container does not overflow. Remove hose from metal container. Install fuel return line to injection pump. Check for leaks.
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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.