Wiper Linkage

This procedure covers the removal and replacement of the windshield wiper linkage assembly on a 2014-2018 Chevrolet Silverado 1500, including disconnecting the wiper motor and removing the cowl panel for access.

Warnings

Tools required

Parts

• Wiper linkage assembly × 1 — Use OEM specification
• Cowl seal weatherstrip (if damaged) × 1 — Use OEM specification

Preparation

1. Park vehicle on level surface and engage parking brake
2. Turn ignition off and remove key
3. Allow engine to cool if recently operated
4. Move wiper arms to park position if not already there
5. Open hood and secure with prop rod

Procedure

1. 1

   Remove wiper arms
   Lift the wiper arm away from the windshield. Remove the protective cap at the base of each wiper arm. Use a 13mm socket to loosen and remove the wiper arm retaining nuts. Mark the position of the wiper arms on the pivot posts with tape or marker. Carefully pull the wiper arms straight off the pivot posts using a rocking motion. If stuck, use a wiper arm puller tool or carefully pry while pulling.
2. 2

   Remove cowl panel fasteners
   Locate and remove all cowl panel screws along the rear edge of the cowl using a 10mm socket. There are typically 6-8 screws spanning the width of the cowl. Remove the rubber weatherstrip seal from the cowl panel by pulling it up and away. Store fasteners in a container to prevent loss.
   Torque spec

   Cover Screws14 Nm (10 lb-ft)
3. 3

   Disconnect washer hoses
   Locate the windshield washer fluid hoses connected to the washer nozzles on the cowl panel. Gently squeeze the hose connectors and pull the hoses off the nozzles. Have a rag ready as some washer fluid may drip. Note the routing of the hoses for reinstallation.
4. 4

   Remove cowl panel
   Carefully lift the cowl panel starting from one end. Release any remaining clips by gently prying with trim tools or a flathead screwdriver. Work slowly across the panel to avoid breaking clips. Once all clips are released, lift the cowl panel up and away from the vehicle. Set aside in a safe location to avoid damage.
5. 5

   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 pull the connector straight off the motor. If equipped, disconnect any ground strap connections.
   Torque spec

   Ground Strap Bolt16 Nm (12 lb-ft)
6. 6

   Remove wiper motor mounting bolts
   Using a 10mm socket, remove the three mounting bolts securing the wiper motor to the wiper linkage assembly. Support the motor as you remove the final bolt. Carefully separate the motor from the linkage assembly, noting the orientation of the motor drive link.
   Torque spec

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

   Remove linkage pivot nuts
   Locate the pivot nuts at each wiper pivot point (driver and passenger side). Use a 13mm socket to remove the nuts securing the linkage pivots to the cowl structure. Support the linkage assembly as you remove the nuts to prevent it from dropping.
   Torque spec

   Linkage Pivot Nuts12 Nm (9 lb-ft)
8. 8

   Remove wiper linkage assembly
   With all fasteners removed, carefully maneuver the wiper linkage assembly out of the cowl area. The assembly may need to be angled or rotated to clear obstructions. Take note of the routing and position of the linkage for proper installation of the new assembly. Inspect the pivot points in the cowl for debris or damage and clean if necessary.
9. 9

   Install new wiper linkage assembly
   Position the new wiper linkage assembly into the cowl area, routing it in the same orientation as the original. Align the pivot points with the mounting holes in the cowl structure. Ensure the linkage moves freely and is not binding against any obstructions before installing fasteners.
10. 10

    Install linkage pivot nuts
    Install the pivot nuts at both driver and passenger side pivot points. Thread the nuts by hand first to ensure proper alignment. Torque the pivot nuts to specification using a torque wrench.
    Torque spec

    Linkage Pivot Nuts12 Nm (9 lb-ft)
11. 11

    Install wiper motor
    Align the wiper motor drive link with the linkage crank arm, ensuring proper engagement. Position the motor against the mounting surface and install the three mounting bolts. Torque the motor mounting bolts to specification.
    Torque spec

    Motor Mounting Bolts10 Nm (7 lb-ft)
12. 12

    Reconnect electrical connections
    Reconnect the wiper motor electrical connector, ensuring it clicks into place securely. If equipped, reconnect and secure any ground strap connections, cleaning contact surfaces before installation and torquing to specification.
    Torque spec

    Ground Strap Bolt16 Nm (12 lb-ft)
13. 13

    Test wiper operation before cowl installation
    Turn the ignition to the RUN position (do not start engine). Test the wiper motor operation through all speeds (low, high, intermittent) and verify smooth operation without binding or unusual noise. Check that the linkage returns to the park position when wipers are turned off. This test ensures proper installation before reassembly.
14. 14

    Reinstall cowl panel
    Position the cowl panel over the wiper linkage area, aligning all mounting holes and clips. Press firmly along the panel to engage all retaining clips. Install all cowl panel screws and torque to specification. Reinstall the rubber weatherstrip seal along the front edge of the cowl.
    Torque spec

    Cover Screws14 Nm (10 lb-ft)
15. 15

    Reconnect washer hoses and install wiper arms
    Reconnect the windshield washer fluid hoses to the nozzles, ensuring they snap into place securely. Align the wiper arms with the marks made during removal and press onto the pivot posts. Install the wiper arm retaining nuts and tighten with a 13mm socket. Install the protective caps. Verify proper wiper arm positioning.

Reassembly

1. Ensure all electrical connectors are fully seated and locked
2. Verify cowl panel clips are fully engaged before tightening screws
3. Check that wiper arms are properly aligned in the park position
4. Verify washer fluid hoses are securely connected and not kinked

Verification

• Start the vehicle and test all wiper speeds (intermittent, low, high) for smooth operation without noise or binding
• Verify wipers return to proper park position when turned off
• Test washer fluid spray function to ensure proper nozzle operation
• Inspect for any fluid leaks around washer hose connections
• Check that wiper blades travel across the full windshield without hitting the cowl or A-pillars
• Verify no rattles or loose components in the cowl area

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