General Motors Issued 2027 Chevy Bolt Service Update
Owners of new 2027 Chevy Bolt vehicles should be aware of a service bulletin regarding taillamp water intrusion.
Updated on Oct. 2, 2026 in Auto Parts
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General Motors issued a service update in September 2026 for 2027 Chevy Bolt vehicles due to potentially loose taillamp harness grommets. The bulletin requires dealers to inspect and repair vehicles currently held in their inventory.
Why it matters
A partially seated grommet can allow water to enter the vehicle during heavy spray, potentially affecting the integrity of the taillamp assembly. Dealers must resolve this condition before any new 2027 model-year units are delivered to customers.
Service Update N262568370 covers 2027 Chevy Bolt models and remains active through September 30, 2027. Repairs require between 0.3 and 0.7 hours of labor depending on whether one or both grommets need reseating.
The players
General Motors
A major automotive manufacturer that oversees production and safety standards for the Chevrolet brand.
The details
Technicians identify the defect by spraying water around the taillamp for one minute to check for intrusion. If a leak is detected, the repair involves removing the entire taillamp assembly to properly reseat the harness grommet against the vehicle sheet metal. No replacement parts are required to complete this correction.
Timeline
September 2026: General Motors released the service bulletin.
September 30, 2027: The service action expiration date.
The Home Front
This action reflects standard quality control measures within the automotive industry designed to address manufacturing inconsistencies before vehicle delivery. It follows the pattern of a standard pre-delivery inspection (PDI) process for identifying assembly defects.
If you have recently purchased a 2027 Chevy Bolt, you may want to confirm that your dealer completed all relevant service updates prior to your delivery date. Keep your service records organized in your vehicle folder to track any maintenance performed during your ownership.
The takeaway
Dealers are responsible for identifying and reseating incorrectly installed taillamp grommets in 2027 Chevy Bolt inventory. If you notice signs of moisture in your taillamps, contact your local service center to ensure your vehicle is assessed by a licensed professional.
Further reading
For more information on maintaining your vehicle, visit the Auto Parts section.
Source note: This article includes information reported by GM Authority.
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