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 MANUALSGMC2010SAVANA SPECIAL 6.0 GREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTWIPER/WASHER SYSTEMSWIPER SYSTEM & WASHER SYSTEMDIAGNOSTIC INFORMATION AND PROCEDURESWINDSHIELD WIPER WASHER SYSTEM MALFUNCTIONCIRCUIT/SYSTEM VERIFICATION
2010 GMC Savana Special 6.0 G
Circuit/System Verification
2010 GMC Savana Special 6.0 GSECTION Circuit/System Verification
- Ignition ON, observe the scan tool Windshield Washer Switch parameter while pressing and releasing the washer switch. The reading should change between Active and Inactive.
- If the reading does not change between the specified values, refer to the Windshield Washer Switch Circuit Test below.
- Connect a test lamp between the relay side of the FRT WASH fuse and ground.
- Ignition ON, verify that the test lamp turns ON and OFF while pressing and releasing the windshield washer switch.
- If the test lamp does not turn ON and OFF while changing between the commanded states, refer to the Windshield Washer Pump Relay Control Circuit Test below.
- If the washer pump does not operate, refer to the Windshield Washer Pump Circuit Test below.
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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.