A software glitch in the OnStar system caused GM to halt sales of certain models, including the brand-new Cadillac ATS.
Some 60,000 vehicles were affected by the glitch, which prevents OnStar’s crash notification system from notifying their call center in certain collisions that don’t trigger the airbags. Among the cars affected are the 2013 Chevrolet Equinox, Cruze and Volt, the Cadillac XTS and ATS, the 2012 Cadillac SRX , the Buick Verano and the GMC Terrain.
According to Automotive News, GM sent a memo to dealers telling them to “stop the delivery” of affected vehicles, and that the issue would be cleared by late September. Most vehicles can be fixed via a remote software flash, however some cars require a manual upgrade performed at the dealer.