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 MANUALSCHEVROLET1998SUBURBAN K2500, 7.4 J, PART TIMEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 8 (ENGINE CONTROLS - BASIC DIAGNOSTIC PROCEDURES - 6.5L TURBO DIESEL)BASIC FUEL SYSTEM CHECKSFUEL PUMP FLOW TEST
1998 Chevrolet Suburban K2500, 7.4 J, Part Time
Fuel Pump Flow Test
1998 Chevrolet Suburban K2500, 7.4 J, Part TimeSECTION Fuel Pump Flow Test
WARNING: This page is about a different variant/trim than selected.
- Remove FUEL SOL fuse. Disconnect fuel line at fuel pump outlet fitting. Install a hose at fuel pump outlet fitting and place hose in a container to collect fuel.
- Crank engine for 15 seconds. If fuel pump does not supply about1/2 pint of fuel in 15 seconds, go to FUEL SYSTEM PRESSURE TEST .
RENDER: 1.0x
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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.