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 MANUALSCHEVROLET2012EXPRESS 2500 V8-4.8LREPAIR AND DIAGNOSISWIPER AND WASHER SYSTEMSWIPER GEAR BOXSERVICE AND REPAIR
2012 Chevrolet Express 2500 V8-4.8L
Wiper Gear Box: Service and Repair
2012 Chevrolet Express 2500 V8-4.8LSECTION Service and Repair
Windshield Wiper Transmission Replacement
Special Tools
* J 39232 Wiper Transmission Separator
* J 39529 Wiper Transmission Installer
Removal Procedure
1. Remove the wiper arms. Refer to Windshield Wiper Arm Replacement Service and Repair.
2. Remove the air inlet grille panel. Refer to Air Inlet Grille Panel Replacement Service and Repair.
3. Disconnect the electrical connector from the wiper motor.
4. Remove the 4 bolts retaining the wiper transmission assembly to the plenum.
5. Remove the wiper transmission assembly from the vehicle.
6. Disconnect the drive link from the wiper motor crank arm using the J 39232.
7. Remove the 2 bolts retaining the wiper motor to the transmission.
8. Remove the wiper motor from the wiper transmission.
Installation Procedure
Caution:
Refer to Fastener Caution Fastener Caution.
1. Install the wiper motor onto the wiper transmission with the 2 bolts and tighten to 8 Nm (71 lb in).
2. Connect the drive link onto the wiper motor crank arm using the J 39529.
3. Install the wiper transmission assembly to the plenum.
4. Install the 4 bolts and tighten to 8 Nm (71 lb in).
5. Connect the electrical connector to the wiper motor.
6. Install the air inlet grille panel. Refer to Air Inlet Grille Panel Replacement Service and Repair.
7. Install the wiper arms. Refer to Windshield Wiper Arm Replacement Service and Repair.
8. Operate the wipers and inspect for proper operation.
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:
- • 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.