GM Issued Service Bulletin for Chevy Equinox EV Brake Noise
Owners of 2024-2027 models may experience rear brake noise while operating their vehicle in reverse.
Updated on Sept. 25, 2026 in Electric Vehicles
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General Motors issued a service bulletin, PIC6656A, addressing reports of noise originating from the rear brakes of 2024 through 2027 Chevy Equinox EV models during reverse operation. The condition, which also affects certain Cadillac Optiq units, appears more frequently in cold or humid weather.
Why it matters
While this bulletin is not a safety recall, it serves as an official technical notice for vehicle owners experiencing unexpected performance issues. Understanding this status helps owners differentiate between standard maintenance updates and urgent safety-critical repairs.
Service Bulletin PIC6656A identifies the issue across 2024-2027 Chevy Equinox EV models and certain Cadillac Optiq units. This documentation tracks issues currently being monitored by manufacturers rather than active safety-critical recalls.
The players
General Motors
An American automotive manufacturer that produces a wide range of electric and internal combustion vehicles.
Chevy Equinox EV
An all-electric SUV model that features a range of up to 319 miles and a starting price point of $35,000.
Cadillac Optiq
A luxury electric vehicle brand that shares platform components with other General Motors electric SUVs.
The details
The noise originates specifically from the rear brake pads when the vehicle is in reverse. Preliminary findings suggest environmental factors, such as cold temperatures or humid weather, increase the frequency of the sound. Because the bulletin is categorized as preliminary information, engineers are still working to isolate the mechanism causing the noise before a permanent fix is finalized.
Timeline
2024: Chevy Equinox EV model year launch.
July 24, 2026: Original service bulletin created.
August 17, 2026: Service bulletin model information revised.
The Home Front
This bulletin is a routine step within the manufacturer-led monitoring process for new electric vehicle platforms. It marks a preliminary phase before potential design adjustments or updated service protocols are officially implemented.
If you drive a 2024-2027 Equinox EV and hear noise while reversing, keep a copy of service bulletin PIC6656A for your records during upcoming service visits. Have a licensed professional at your dealership inspect the rear brake pads if the noise persists or worsens.
The takeaway
Technical service bulletins help track non-safety issues that may arise as vehicle fleets age or encounter environmental extremes. Monitor your vehicle’s performance and contact your local dealership to reference bulletin PIC6656A if you encounter this specific noise.
Further reading
For more information on the latest manufacturer notices, visit Electric Vehicles.
Source note: This article includes information reported by GM Authority.
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