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 MANUALSCHEVROLET2019TAHOE LS, 4WD, GAS/ETHANOLREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 49 (WIPER SYSTEM AND WASHER SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESREAR WIPER SYSTEM MALFUNCTIONCIRCUIT/SYSTEM VERIFICATION
2019 Chevrolet Tahoe LS, 4WD, Gas/Ethanol
Circuit/System Verification
2019 Chevrolet Tahoe LS, 4WD, Gas/EthanolSECTION Circuit/System Verification
WARNING: This page is about a different car, the 2018 Chevrolet Sonic. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition ON.
- Verify the Scan Tool Rear Wiper Switch Parameter changes between ON and OFF when cycling the rear wiper switch ON and OFF.
- If the parameter does not change
Refer to Circuit/System Testing - Rear Wiper/Washer Switch Malfunction
- Go to next step: If the parameter changes
- If the parameter does not change
- Verify the M45 Rear Wiper Motor cycles when commanding the rear wiper ON with the rear wiper switch
- If the M45 Rear Wiper Motor does not cycle
Refer to Refer to Circuit/System Testing - Rear Wiper Motor Malfunction
- Go to next step: If the M45 Rear Wiper Motor cycles
- If the M45 Rear Wiper Motor does not cycle
- Verify the M45 Rear Wiper Motor returns to the park position when the rear wipers are turned OFF
- If the M45 Rear Wiper Motor does not return to the park position
Refer to Circuit/System Testing - Rear Wiper Motor Malfunction
- Go to next step: If the M45 Rear Wiper Motor returns to the park position
- If the M45 Rear Wiper Motor does not return to the park position
- All OK.
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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.