2016-2019 Chevrolet Volt Wiper Assembly: Part Updates and the Pedestrian Slip-Shaft Issue
This guide covers the multiple GM part number updates, common failure symptoms, and a critical TSB regarding the unique pedestrian protection design for the Gen 2 Volt.
- The wiper assembly includes the motor and linkage; they must be replaced as one unit.
- GM updated this part twice. Always buy the latest version, part number 84456254.
- A TSB warns of a 'Pedestrian Protection Slip Shaft' that can break if handled improperly, requiring full replacement.
- Common failure symptoms include wipers stopping mid-swipe, moving out of sync, or making grinding noises.
Understanding the Wiper Module Assembly for the 2016-2019 Volt
The wiper system on the second-generation Chevrolet Volt (2016-2019) is a single, non-serviceable module that includes both the wiper motor and the mechanical linkage (transmission). This means if your wiper motor burns out or a plastic bushing in the linkage breaks, you must replace the entire assembly. General Motors updated this part multiple times during its production run, making it crucial to understand the different part numbers when sourcing a replacement.
Key Part Number Updates
It is highly recommended to purchase the latest available part number to benefit from any design improvements. The part numbers were superseded in the following order:
- 23235988 (Original part)
- 84073206 (First replacement)
- 84456254 (Final and current recommended part)
When buying a used part, always try to find an assembly with the number 84456254, or at least 84073206, to ensure you have a more recent version.
TSB Alert: GM issued Service Bulletin 16-NA-163 for the 2016-2017 Volt regarding a 'Pedestrian Protection Slip Shaft.' The pivot shafts that the wiper arms mount to are designed to collapse downward during a pedestrian collision to reduce injury. This feature can be accidentally triggered by applying downward force while servicing the wipers or cowl area. If the shaft slips, it cannot be repaired, and the entire wiper module assembly must be replaced. This is not considered a manufacturing defect and is not covered by vehicle warranty.
Symptoms of a Failing Wiper Linkage Assembly
Because the motor and linkage are one unit, symptoms can be either mechanical or electrical. Here are the most common signs of failure:
- Wipers Stop Mid-Swipe: The wipers may stop in the middle of the windshield and refuse to move or park correctly. This can be caused by a failed motor or a seized pivot point in the linkage.
- Chattering or Stuttering Motion: Wiper blades that hesitate or move erratically across the glass can indicate a loose linkage or a failing motor.
- Wipers Move Out of Sync: If one wiper moves correctly but the other doesn't, or they collide, a plastic bushing in the linkage has likely broken or a linkage arm has popped off its ball joint.
- Grinding or Clanking Noises: Any unusual noise from the base of the windshield when the wipers are on points to a mechanical problem with the linkage.
- No Movement and No Motor Sound: If you turn the wipers on and hear nothing, the problem is likely electrical, pointing to the wiper motor itself, a fuse, or the control switch.
Buying a Used 2016-2019 Volt Wiper Assembly: What to Check
A used OEM assembly can be a cost-effective and reliable repair, especially if you get the latest part version. Here’s what to inspect before you buy:
- Confirm the Part Number: Prioritize finding part number 84456254. Ask the seller to provide a clear photo of the sticker on the part.
- Inspect the Pivot Shafts: This is the most critical check. Look at the two shafts where the wiper arms mount. Ensure they are at the same height and appear secure. Ask the seller to confirm the 'pedestrian protection slip shaft' feature was not tripped during removal. Any sign of damage or displacement here means the part is unusable.
- Check for Play: Hold the assembly and try to move the linkage arms by hand. There should be smooth movement with very little slop or play in the joints. Loose, wobbly joints indicate worn bushings.
- Examine for Corrosion: Look for rust or water damage on the motor housing and around the pivot points. Corrosion suggests the part was exposed to the elements and may have a shorter lifespan.
- Ask About the Donor Vehicle: A part from a lower-mileage, later-model-year (e.g., 2019) vehicle is always preferable to one from an older (2016) or high-mileage car.
Cost Comparison
| Part Type | Estimated Cost | Notes |
|---|---|---|
| New OEM (GM) | $250 - $440 | Part number 84456254. Price varies by dealership. |
| New Aftermarket | Not Commonly Available | Major aftermarket brands do not appear to offer a direct replacement assembly for this specific vehicle. |
| Used OEM | $90 - $150 | Prices vary based on condition, part number, and seller. |
| Shop Labor | $110 - $170 | Typically 1.0 to 1.5 hours of labor. |
Replacement Overview & Difficulty
Replacing the wiper module is a straightforward job for a DIYer with basic tools.
- Difficulty: 3 out of 5
- Estimated Time: 1.5 hours
- Tools Needed: Socket set, trim removal tools, torque wrench.
Basic Steps:
- Ensure the wipers are in the 'parked' position and disconnect the 12V battery.
- Use a trim tool to pop the caps off the base of the wiper arms and remove the nuts. Gently rock the arms to remove them from the pivot shafts. Mark their position on the windshield with tape first.
- Carefully remove the plastic cowl cover at the base of the windshield. It is held in by several clips and push-pins.
- Disconnect the electrical connector from the wiper motor.
- Unbolt the wiper module assembly from the vehicle's firewall.
- Installation is the reverse of removal. Be extremely careful not to put downward pressure on the new assembly's pivot shafts to avoid tripping the pedestrian protection feature.
Frequently Asked Questions (FAQ)
Which part number do I need for my 2017 Volt?
You should always try to buy the latest version, which is GM part number 84456254. It replaces the older 84073206 and 23235988 parts and fits all 2016-2019 Volt models.
Is the wiper motor included with the linkage?
Yes. For the 2016-2019 Volt, the wiper motor and linkage transmission are sold as a single, complete module assembly. You cannot buy the motor or linkage separately from GM.
Can I just replace the little plastic bushings in the linkage?
No, GM does not sell the individual bushings or linkage arms for this assembly. While some universal bushing kits exist, finding an exact match is not guaranteed. The standard repair is to replace the entire wiper module.
Why did my wipers stop working after I tried to lift them from the windshield?
You may have accidentally triggered the 'Pedestrian Protection Slip Shaft' feature described in GM Service Bulletin 16-NA-163. Applying excessive force can cause the pivot shaft to dislodge. If this happens, the entire assembly must be replaced.
Technical Specifications
OEM Part Numbers: 23235988 84073206 84456254
Assembly includes wiper motor and transmission/linkage. Features a pedestrian protection slip-shaft design on the pivots.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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- 🛍️ Shop This Part
- Understanding the Wiper Module Assembly for the 2016-2019 Volt
- Key Part Number Updates
- Symptoms of a Failing Wiper Linkage Assembly
- Buying a Used 2016-2019 Volt Wiper Assembly: What to Check
- Cost Comparison
- Replacement Overview & Difficulty
- Frequently Asked Questions (FAQ)
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