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 MANUALSCHEVROLET2006SUBURBAN K2500, 6.0 UREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 271 (FUEL SYSTEM)FUEL PUMP UNIT INSPECTIONCIRCUIT OPEN/SHORT INSPECTION
2006 Chevrolet Suburban K2500, 6.0 U
Circuit Open/Short Inspection
2006 Chevrolet Suburban K2500, 6.0 USECTION Circuit Open/Short Inspection
WARNING: This page is about a different car, the 2004 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
- Inspect the following wiring harnesses for open or short circuit (continuity check).
- Open circuit
- If there is no continuity, there is an open circuit. Repair or replace the harness.
- Fuel pump unit terminal A and fuel pump relay terminal C
- Fuel pump unit terminal E and body GND (except for California emission regulation applicable model)
- Fuel pump unit terminal B and body GND (for California emission regulation applicable model)
- If there is no continuity, there is an open circuit. Repair or replace the harness.
- Short circuit
- If there is continuity, there is a short circuit. Repair or replace the harness.
- Fuel pump unit terminal A and body GND
- Fuel pump unit terminal E and power supply (except for California emission regulation applicable model)
- Fuel pump unit terminal B and power supply (for California emission regulation applicable model)
- If there is continuity, there is a short circuit. Repair or replace the harness.
- Open circuit
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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.