Wiper Linkage

This procedure covers the removal and replacement of the windshield wiper linkage assembly on a 2023 Chevrolet Bolt EUV, including wiper motor disconnection and cowl panel removal.

Warnings

Tools required

Parts

• Wiper linkage assembly × 1 — Use OEM specification
• Cowl seal weatherstrip (if damaged) × 1 — Use OEM specification
• Plastic panel clips (replacement set) × 1 — Use OEM specification

Fluids

• Windshield Washer Fluid — 0.5 qt

Preparation

1. Park vehicle on level surface and apply parking brake.
2. Turn vehicle OFF and remove key fob from proximity to prevent accidental power-on.
3. Allow vehicle to sit for at least 2 minutes to ensure all systems are powered down.
4. Open hood and support with prop rod.
5. Mark wiper blade rest positions on windshield with masking tape for reference.
6. Disconnect 12V battery negative terminal to isolate electrical system.

Procedure

1. 1

   Remove wiper arms
   Lift wiper arm away from windshield. Remove the protective cap from the wiper arm base. Using a 13mm socket, loosen the wiper arm retaining nut but do not fully remove yet. Use a wiper arm puller tool or carefully work the arm back and forth while pulling away from the base to break it free from the splined shaft. Remove the nut completely and lift wiper arm away. Repeat for passenger side wiper arm.
2. 2

   Remove cowl panel cover
   Open the hood fully. Remove the rubber weatherstrip seal from the cowl area by pulling upward along its length. Locate the Torx screws securing the cowl panel cover (typically 4-6 screws along the cowl). Using a T20 Torx driver, remove all cowl cover mounting screws. Carefully lift the cowl panel cover upward and toward the windshield to disengage the rear clips, then remove from vehicle. Set aside in a safe location to prevent damage.
3. 3

   Disconnect washer hoses
   Locate the windshield washer fluid hoses connected to the washer nozzles at the base of the windshield. Using a flat blade screwdriver if needed, carefully depress the locking tabs and disconnect the washer hoses from the nozzles. Allow any residual washer fluid to drain into a suitable container. Cap or plug hoses to prevent fluid loss and contamination.
4. 4

   Disconnect wiper motor electrical connector
   Locate the wiper motor electrical connector on the driver side of the wiper motor assembly. Press the locking tab and carefully pull the connector straight away from the motor. Ensure the connector is positioned away from the work area and will not be damaged during linkage removal.
5. 5

   Remove wiper motor mounting bolts
   Using a 10mm socket, remove the three wiper motor mounting bolts that secure the motor to the cowl support structure. Support the wiper motor and linkage assembly with one hand while removing the final bolt to prevent the assembly from dropping.
   Torque spec

   Motor Mounting Bolts10 Nm (7 lb-ft)
6. 6

   Remove linkage pivot nuts
   Locate the linkage pivot points on both driver and passenger sides where the linkage arms connect to the cowl structure through rubber bushings. Using a 10mm socket, remove the nuts securing each pivot point. There are typically two pivot nuts total (one per side). Keep these nuts and any washers organized for reinstallation.
   Torque spec

   Linkage Pivot Nuts12 Nm (9 lb-ft)
7. 7

   Remove wiper linkage assembly
   Carefully maneuver the complete wiper motor and linkage assembly out of the cowl area. This may require tilting and rotating the assembly to clear the cowl structure and HVAC fresh air inlet. Work slowly to avoid catching linkage arms on any surrounding components. Once clear, remove the assembly from the vehicle and place on a clean work surface.
8. 8

   Inspect and clean mounting areas
   With the linkage removed, inspect the cowl area for debris, leaves, or standing water. Use compressed air or a vacuum to clean the cowl drain channels and pivot mounting points. Inspect rubber grommets and bushings at pivot points for deterioration or damage. Replace if cracked or compressed. Clean all mounting surfaces with a clean cloth.
9. 9

   Install new wiper linkage assembly
   Position the new or replacement wiper linkage assembly into the cowl area, carefully maneuvering it into position. Align the pivot points with their mounting holes in the cowl structure. Insert the linkage pivots through the mounting holes and install the pivot nuts finger-tight on both sides. Position the wiper motor into its mounting location and start all three mounting bolts finger-tight before final tightening.
10. 10

    Torque linkage pivot nuts and motor bolts
    Using a torque wrench and 10mm socket, torque the linkage pivot nuts to specification. Then torque the three wiper motor mounting bolts to specification in a cross-pattern to ensure even clamping force.
    Torque spec

    Linkage Pivot Nuts12 Nm (9 lb-ft)

    Motor Mounting Bolts10 Nm (7 lb-ft)
11. 11

    Reconnect electrical and washer connections
    Reconnect the wiper motor electrical connector, ensuring it clicks fully into place and the locking tab engages. Reconnect the windshield washer hoses to the nozzles, pushing firmly until they seat completely with an audible click. Verify connections are secure by gently tugging on each hose.
12. 12

    Reinstall cowl panel cover
    Position the cowl panel cover over the linkage assembly, engaging the rear clips first by tilting the panel toward the windshield and then lowering into place. Ensure all alignment points are properly seated. Install all Torx mounting screws and tighten securely but do not overtighten plastic components. Reinstall the rubber weatherstrip seal along the cowl edge, ensuring it is fully seated in its channel.
13. 13

    Reinstall wiper arms
    Before installing wiper arms, reconnect the 12V battery negative terminal. Turn vehicle to ACC or ON mode and activate wipers momentarily to cycle linkage to the park position, then turn OFF. Position each wiper arm onto its splined shaft, aligning with the reference marks made during removal. Install the retaining nut on each arm and torque to a snug fit (approximately 20-25 Nm, though not specified in torque list - use manufacturer recommendation). Install protective caps over nuts. Verify proper wiper blade positioning before final testing.

Reassembly

1. Ensure all electrical connectors are fully engaged with locking tabs secured.
2. Verify washer hoses are properly connected and routed without kinks or interference with moving linkage.
3. Check that cowl panel cover is fully seated with all clips engaged and no gaps visible.
4. Confirm wiper arms are positioned correctly in their park position before final testing.

Verification

• Reconnect 12V battery if not already done. Torque battery terminal bolt to specification.
• Start vehicle and test wiper operation at all speeds (intermittent, low, high) to verify smooth operation without binding or unusual noise.
• Activate windshield washer system to verify spray pattern and confirm no leaks at hose connections.
• Verify wipers return to correct park position when turned off.
• Check for any interference between wiper arms and hood or cowl panel throughout full wiper sweep.
• Test wiper operation after a short test drive to ensure no issues develop under normal driving conditions.

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