GM said the hands-free driver-assistance system reached the mark across nearly 750,000 vehicles in the US and Canada.
Vice-president Rashed Haq said renewal rates are close to 40%, after three free years before the feature requires an active OnStar subscription.
Introduced in 2017, Super Cruise works on about 700,000 miles of pre-mapped restricted-access highways and uses a driver-facing infrared camera to monitor attention.
When GM's 'eyes-off' system needs help, can a distracted driver safely take back control in seconds?
Is Super Cruise's subscription revenue the start of a new, profitable business model for all automakers?
With zero crashes reported while active, what are the hidden risks when Super Cruise suddenly disengages?