GM estimates that 100% of the 32,988 vehicles in the recall population carry the defect. The 2025 Corvette Coupe accounts for the largest share at 9,759 units, followed by the 2025 Convertible at 6,930 and the 2026 Corvette Coupe at 7,694. ZR1X variants are limited in volume, with 49 Coupes and 41 Convertibles in the affected range.
The defect originates at the supplier level. In October 2024, Valeo Lighting Systems North America LLC, the rear-lamp assembly supplier, pushed a software update designed to help technicians complete a tire pressure monitoring system (TPMS) learn procedure. The update addressed one need and created another problem: it inadvertently disabled the exterior lighting control module's ability to detect a failed rear turn signal in certain circumstances. Every vehicle built with the updated software, and before a corrected calibration was implemented in production on February 2, 2026, is out of compliance with Federal Motor Vehicle Safety Standard (FMVSS) No. 108.
What drivers need to know
FMVSS 108 requires that drivers receive notification when a rear turn-signal lamp fails. In the affected Corvette vehicles, that notification does not occur. A driver with a burned-out rear turn signal receives no in-cabin alert, continues activating a signal that other drivers and pedestrians cannot see, and has no way of knowing the lamp is out.
The safety consequence is straightforward: other road users lose a visual cue they rely on to anticipate a turn or lane change. GM has identified no crashes or injuries tied to this condition, and no field complaints were on record when the recall decision was made. The defect was discovered internally during validation testing for the 2027 model year Corvette, not through a customer incident.
The remedy is a software calibration update to the exterior lighting control module. For vehicles equipped with over-the-air (OTA) update capability, owners who have accepted the applicable terms and conditions can receive the fix wirelessly, without a dealership visit. All affected owners also have the option to bring their vehicle to a GM dealer for the update at no cost. All covered vehicles are under warranty, so no reimbursement program is in place.
Dealers were notified on April 2, 2026. VINs became searchable in the NHTSA recall database the same day. Owner remedy notification letters are scheduled to begin mailing on May 18, 2026, as a phased recall. Owners can verify their vehicle's recall status at nhtsa.gov/recalls.
GM recall background
The issue traces back to October 2024, when Valeo Lighting Systems pushed a software change to the rear-lamp assembly to assist technicians with the TPMS learn process. That single update inadvertently blocked the exterior lighting control module from detecting a rear turn-signal failure, creating an FMVSS 108 noncompliance across every unit built with the updated software from that point forward.
The defect came to light more than a year later. On December 9, 2025, a GM employee submitted a report through GM's internal Speak Up for Safety (SUFS) system, following validation testing for the 2027 model year Corvette. During that test, the vehicle failed to detect and notify the driver of an inoperative rear turn signal. GM opened a formal product investigation on January 27, 2026.
The investigation moved quickly. GM identified the root cause, implemented corrected software calibrations at the assembly plant on February 2, 2026, and closed out the production-side fix before the recall was even formally decided. GM's Safety Field Action Decision Authority (SFADA) decided to conduct a noncompliance recall on March 26, 2026, with no field complaints or incidents on record. The Part 573 report was submitted to NHTSA on April 2, 2026, the same day dealers were notified.
For a full view of GM's recall activity and other major OEM recalls this quarter, see BizzyCar's most recent quarterly recall report.
Read the latest BizzyCar Quarterly Recall Report
How BizzyCar can help
With 32,988 vehicles in the recall population and owner notification letters not scheduled to mail until May 18, there is a six-week window where affected Corvette owners will have no official word from GM. For Chevrolet dealers with 2025 and 2026 Corvette customers in their database, that window is a direct opportunity.
BizzyCar's Recall Outreach product identifies which vehicles in a dealer's customer base carry open recalls and reaches those owners through automated two-way SMS, before NHTSA letters arrive, before the service drive backs up, and before customers call wondering why nobody told them. For Corvette owners, a turn-signal software update is a quick, no-charge service appointment. For dealers, proactive recall outreach on a straightforward software fix is one of the lowest-friction ways to bring a customer back in the door and demonstrate that the dealership is paying attention. Book a Demo
