Cadillac has issued a service update for certain 2026 Optiq electric crossovers after owners reported inconsistent braking performance at low speeds. The issue appears during specific driving situations, particularly when the vehicle transitions from smooth pavement onto rough or uneven surfaces.
According to a newly released GM service bulletin, the problem is tied to the brake system control module software rather than any physical defect with the braking hardware itself. Drivers may notice that the brake pedal response feels uneven or reduced during low-speed ABS intervention, creating an inconsistent feel behind the wheel.
The service action, identified as N252528241, affects a limited number of 2026 Cadillac Optiq models. GM says the condition can be corrected through updated software calibration for the vehicle’s brake system control module, eliminating the need for any hardware replacement.
Although braking-related issues often trigger recalls, GM is treating this situation as a service update rather than a formal safety recall. The automaker has already begun rolling out the fix to dealer inventory vehicles as well as customer-owned examples currently on the road.
Software Calibration Identified as Root Cause
Modern EVs rely heavily on integrated software systems to manage everything from regenerative braking to traction and stability control. In the case of the Optiq, GM says the issue stems from how the brake control software interprets changing road conditions during low-speed driving.
The bulletin specifically references scenarios where the vehicle encounters rough pavement immediately after traveling on a smoother surface. Under those circumstances, the system may alter brake response in a way that feels inconsistent to the driver.
Importantly, GM notes that the condition does not involve defective brake components, hydraulic failures, or reduced mechanical braking capability. Instead, engineers identified the issue within the software logic governing brake system responses.
OTA Updates Reduce Dealer Visits
One notable aspect of the fix is that many owners may never need to visit a dealership. GM says the updated calibration can be delivered through over-the-air software updates, allowing affected Optiq models to receive the repair remotely.
Dealers can also manually install the update if necessary. GM estimates that the complete programming and verification procedure takes less than 30 minutes to complete when performed in a service department.
Over-the-air updates have become increasingly important for automakers as vehicles grow more software-dependent. Problems that once required component replacements or lengthy service appointments can now often be corrected with revised code deployments.
Cadillac Optiq Continues GM’s EV Expansion
The Cadillac Optiq serves as one of GM’s newest entries into the luxury EV market, positioned below the larger Lyriq in the brand’s electric lineup. Built on GM’s Ultium-based architecture, the crossover is designed to attract younger luxury buyers looking for a more compact and technology-focused EV.
As with many newly launched software-heavy vehicles, early production models occasionally reveal calibration issues after reaching customers. Automakers frequently issue technical service bulletins and software revisions during the first years of production to address drivability concerns and improve system behavior.
The Optiq braking update also reportedly applies to certain Chevrolet Equinox EV models, suggesting the issue may involve shared electronic braking system software used across multiple GM electric vehicles.
Not Classified as a Recall
Despite the attention generated by braking-related complaints, GM has not classified the issue as a recall campaign at this time. Service updates differ from recalls because they are typically issued for non-safety-critical concerns or situations that do not violate federal safety standards.
Owners experiencing unusual low-speed braking behavior are still encouraged to contact Cadillac dealers to confirm whether their vehicle qualifies for the software update. Vehicles in dealer inventory are expected to receive the revised calibration before delivery to customers.
GM states that the service update program will remain active through May 31, 2028, giving owners several years to receive the correction if needed.