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.
Circuit/System Verification
2011 GMC Savana Special 4.8 ASECTION Circuit/System Verification
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.
- Ignition OFF, verify the fan clutch is not seized or binding.
- Ignition ON, observe the DTC information with a scan tool. Verify DTC P0480, P0483, or P0526 is not set, if a DTC is set diagnose that DTC first.
- Engine idling at operating temperature with all accessories turned OFF, for greater than 10 minutes.
- Observe the scan tool DTC information. Verify DTC P0495 is not set.
- If the DTC is set, replace the cooling fan clutch assembly.
- Engine at operating temperature, Operate the engine at 1, 500 RPM for 2 minutes. Observe the DTC information with a scan tool. Verify DTC P0495 is not set.
- If the DTC is set, replace the cooling fan clutch assembly.
- Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
NOTE:
Depending on elevation above sea level it may take up to 52 minutes for the fan clutch to completely disengage.
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.