General Motors Addressed 2027 Chevy Bolt Rattle
The automaker issued a service bulletin to fix a rattling sound caused by a loose sensor mount behind the rearview mirror.
Updated on Oct. 5, 2026 in Electric Vehicles
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General Motors has issued service bulletin 26-NA-201 to resolve a persistent rattling noise in the 2027 Chevy Bolt. The issue stems from a loose insert within the windshield multifunction sensor mount bracket cover located behind the rearview mirror.
Why it matters
The repair addresses a quality control issue that may cause cabin noise when drivers travel over bumpy terrain. By installing precise felt tape patches, technicians can secure the loose sensor component and prevent the rattling sound.
Technicians must apply two pieces of felt tape measuring 6.5 mm by 6.5 mm and 1 mm thick to the sensor bracket insert. The vehicle utilizes a 65 kWh LFP GM Ultium battery pack to achieve a driving range of 262 miles.
The players
General Motors
General Motors is a major American automotive manufacturer that produces vehicles at the Fairfax Assembly plant in Kansas City, Kansas.
The details
Technicians resolve the rattle by removing the loose sensor mount bracket cover insert and applying felt or flocking tape to the forward tabs. The cover is then reattached, ensuring the tape patches make contact with the rear tuning bumps.
Timeline
General Motors issued the guidance on October 5, 2026.
Roadmap
This service bulletin highlights the ongoing refinement of components within the GM BEV2 platform during the vehicle's 18-month production run. Such updates are common as automakers iterate on electric vehicle assembly to maintain quality standards against intensifying market competition.
Owners of the 2027 Chevy Bolt who notice interior rattling should contact their local dealer to reference service bulletin 26-NA-201 for the repair. The fix is a routine maintenance procedure that ensures the sensor mount bracket remains secure while driving.
The takeaway
Maintaining interior component stability is essential for preserving the driving experience in modern electric vehicles. Owners should monitor their vehicles for unexpected cabin noises and consult official service bulletins to address potential mechanical fitment issues early.
Further reading
For more information on recent manufacturing updates, visit the Electric Vehicles section.
Source note: This article includes information reported by GM Authority.
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