General Motors has temporarily suspended the dealer fix for a software anomaly that can trigger unwanted hard braking on several 2026 model-year vehicles equipped with Super Cruise, according to a dealer bulletin issued this week and reported by GM Authority. The suspension leaves dealerships holding inventory they are not permitted to sell, while the underlying “Unwanted Integrated Brake Assist” condition remains unresolved for those specific configurations.
Highlights
- Fix suspended only for 2026 Super Cruise–equipped Cadillac CT5, Chevy Equinox EV, Chevy Silverado EV, and GMC Sierra EV
- Full-size SUVs (Escalade, Tahoe, Suburban, Yukon) remain eligible for the repair
- Underlying condition causes aggressive, unprompted brake-assist activation the driver did not request
- GM provided no explanation for the pause and no timeline for resumption
What the Bulletin Covers
The action stems from Technical Service Bulletin N252521591-02, dated February 10, 2026, which GM uses to address what it calls “Unwanted Integrated Brake Assist.” The condition involves unexpected hard braking when the Integrated Brake Assist system misreads sensor data and intervenes as if a collision threat were present. GM’s prescribed repair reprograms the Image Processing Module, the onboard unit that handles forward camera and sensor data feeding the brake-assist function. Labor time is approximately one hour.
The bulletin originally covered the 2026 Cadillac Escalade, Escalade IQ and IQL, Vistiq, Chevy Tahoe, Chevy Suburban, GMC Yukon, and Yukon XL. The February revision expanded coverage to add the 2026 Cadillac CT5, Chevy Equinox EV, Chevy Silverado EV, and GMC Sierra EV.
Scope of the Pause
According to this week’s dealer bulletin, GM has now suspended the repair procedure specifically for the 2026 Cadillac CT5, Chevy Equinox EV, Chevy Silverado EV, and GMC Sierra EV when those vehicles are equipped with Super Cruise. Non–Super Cruise variants and the full-size SUVs originally covered by the bulletin continue to receive the software update as normal.
GM has not publicly disclosed the reason for the suspension or when the fix will resume for the affected configurations. The implication is that the existing reprogramming did not interact correctly with the Super Cruise hands-free driver-assistance stack, requiring further calibration work before the procedure can be reinstated.
Dealer and Consumer Impact
The original bulletin instructed dealers that affected vehicles “must be held and not delivered to customers, dealer-traded, released to auction, used for demonstration, or any other purpose” until the fix is applied. Certified Pre-Owned units fall out of CPO status until the update is completed. With the fix now unavailable for a subset of 2026 Super Cruise–equipped models, dealerships are left with inventory on stop-sale status and no corrective action available. The current bulletin is set to expire November 30, 2027.
Owners of earlier model years with Super Cruise or of the full-size SUVs covered by the bulletin remain eligible to have the reprogramming performed at authorized dealers.
Broader Context
Integrated Brake Assist relies on forward-facing cameras and onboard image processing to identify collision scenarios and supplement driver braking input. Software sensitivity in these systems has become an industry-wide concern, with phantom braking complaints surfacing across multiple manufacturers. A long-running class action against Honda over its collision mitigation braking system recently advanced toward trial on similar allegations, and comparable suits have been filed against Volkswagen and Nissan. Earlier this year, GM also recalled a separate group of 2025 Chevrolet Equinox EVs not equipped with Super Cruise after a different brake-control software defect affected adaptive cruise control braking.
The Super Cruise suspension underscores the calibration difficulty of layering advanced driver-assistance functions on top of vision-based active safety systems, where a sensitivity adjustment intended to reduce one failure mode can introduce conflicts with other vehicle subsystems.
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