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HOMESERVICE MANUALSGMC2011SAVANA SPECIAL 4.8 AREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 171 (ENGINE COOLING SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC P0480 (LGH)COMPONENT TESTING
2011 GMC Savana Special 4.8 A

Component Testing

2011 GMC Savana Special 4.8 ASECTION Component Testing
WARNING: This page is about a different car, the 2011 GMC Savana and 2011 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.

EV Fan Clutch Solenoid Valve Test-Static

  1. Disconnect the fan clutch jumper harness connector X142.
  2. Test for 5-12 Ξ© between terminal B and terminal A of the jumper harness connector.
    • If not within the specified range, replace the fan clutch assembly.
  3. Measure the resistance between the terminals listed below. The DMM should display OL.
    • B and C
    • B and D
    • B and E
    • B and the fan clutch housing/ground
    • If less than the specified range, test the circuits of the jumper harness for an open/shorted condition. If the jumper harness tests normal, replace the cooling fan clutch assembly.
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:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.