2016-2020 Cadillac CT6 Windshield Wiper Motor: Diagnosis and Replacement Guide

Symptoms of a Failing 2016-2020 Cadillac CT6 Wiper Motor

A wiper motor rarely fails without warning. Recognizing the early signs can help you address the issue before you're caught in a storm with no visibility. The most common symptoms are related to the speed, movement, and parking position of the wipers.

• Wipers Move Slowly: If you select a high-speed setting and the wipers move sluggishly, it's a strong indication that the motor is wearing out and losing its power.
• Erratic Speed or Stalling: Wipers that speed up, slow down randomly, or stop and start on their own point to internal motor issues or inconsistent electrical power. This could be caused by worn internal gears or a problem with the motor's circuitry.
• Wipers Only Work on One Speed: If the wipers only function on the high-speed setting, this often points to a failure in the motor's internal speed control module or resistor, which is responsible for managing the voltage for different speeds.
• Wipers Won't Park Correctly: When you turn the wipers off, they should return to their resting position at the base of the windshield. If they stop in the middle of the glass or in another incorrect position, the motor's internal parking mechanism is likely faulty.
• No Movement at All: The most obvious symptom is a complete failure to move when you activate the switch. While this could be a blown fuse, if the fuse is good, the motor itself is the next most likely culprit.
• Humming or Grinding Noises: Any unusual sounds like humming, grinding, or clicking from the cowl area when the wipers are on suggest the motor's internal gears are stripped or it's struggling to move the wiper linkage.

Known Issues, Recalls, and TSBs

As of mid-2026, there are no specific recalls or widespread Technical Service Bulletins (TSBs) from General Motors or the National Highway Traffic Safety Administration (NHTSA) that directly address a common failure of the windshield wiper motor on the 2016-2020 Cadillac CT6. Searches of owner forums and repair databases suggest that failure is not a common, systemic problem for this model but rather occurs due to normal wear and tear over time. The most common reported issues are general symptoms of motor failure rather than a specific, recurring defect.

Buying a Used 2016-2020 CT6 Wiper Motor: What to Check

Purchasing a used OEM wiper motor is a great way to save money compared to expensive new parts from a dealer. Because this part is generally reliable on the CT6, a low-mileage used unit is a smart buy. Here’s what to inspect:

• Verify the Part Number: Check the listed OEM part numbers (such as 23368170) against the part you are buying. This is your first step in ensuring compatibility.
• Motor Only vs. Full Assembly: Look at the photos carefully. Does the part include the long metal arms of the wiper linkage, or is it just the black motor housing? If your linkage is damaged, you'll need the full assembly. If only your motor has failed, buying just the motor can save you money and might be an easier installation.
🎬 See how to replace a Cadillac wiper linkage assembly
• Check the Electrical Connector: Inspect the electrical connector pins. They should be straight, clean, and free of any green or white corrosion. Corroded pins indicate water intrusion, which is a major red flag. The CT6 motor typically uses a 5-pin blade-style connector.
• Inspect the Output Shaft: This is the splined metal stud where the wiper linkage attaches. Check for excessive rust or any signs that the splines are stripped. The linkage arm must grip this shaft tightly to work correctly.
• Ask About Mileage: Always ask the seller for the mileage of the vehicle the part came from. A motor from a vehicle with under 80,000 miles is generally a safe bet for long-term reliability.
• Look for Physical Damage: Check the motor's housing for any cracks, deep gouges, or signs that it has been dropped. While cosmetic, severe damage could point to internal problems.

Cost Comparison: New vs. Used

Prices can vary based on supplier and location, but this table provides a general estimate for the 2016-2020 Cadillac CT6 wiper motor.

Replacement Overview & Difficulty

Replacing the wiper motor on a Cadillac CT6 is a moderately easy job for a DIY mechanic with basic tools. The main challenge is carefully removing the plastic cowl panel without breaking any clips.

• Difficulty: 2.5 out of 5
• Estimated Time: 1-1.5 hours
• Tools Needed: Ratchet and socket set (13mm is common for wiper arms), trim removal tools, small screwdriver.

General Steps:

1. Mark the position of the wiper blades on the windshield with painter's tape to ensure correct reinstallation.
2. Remove the plastic caps at the base of the wiper arms and undo the nuts holding them on. Wiggle the arms off the splined posts. A special wiper arm puller tool may be helpful if they are stuck.
3. Carefully remove the plastic clips holding the windshield cowl (the plastic trim between the hood and windshield) and remove the cowl to expose the wiper motor and linkage assembly.
4. Disconnect the motor's electrical connector.
5. Unbolt the motor from the linkage and/or the vehicle's firewall. There are typically three bolts holding the motor in place.
🎬 Watch: Cadillac windshield wiper motor removal and replacement guide
6. Before installing the new motor, it's a good practice to connect it electrically, turn the ignition and wipers on and then off again. This allows the motor to cycle to its 'park' position.
7. Install the new motor and reassemble everything in reverse order.

Part Numbers & Compatibility

These part numbers are known to be associated with the 2016-2020 Cadillac CT6 wiper motor. However, always confirm fitment using a VIN, as variations exist.

Frequently Asked Questions (FAQ)