GM President Dan Ammann told investors that GM is in the lead to deploy the vehicles in large numbers.
Once they're on the road, the vehicles' computers will constantly learn and improve.
"Getting first onto that learning curve is pretty important," he said.
GM is one of several companies that have announced plans to put self-driving vehicles on the road within a few years.
Google's Waymo division will soon start testing self-driving vehicles in Phoenix without a backup driver in the front seat.
An employee in the back seat will be able to stop the vehicle by pushing a button but won't be able to steer the vehicle.
Delphi, an automotive supplier, has said it expects commercial vehicles to be using its autonomous system in limited areas in 2019.
Delphi recently bought autonomous software startup NuTonomy and is also partnering with BMW AG, chip-maker Intel Corp and camera and visual recognition software maker Mobileye.
German automaker Daimler AG has teamed up with supplier Bosch to develop autonomous taxis by 2020.
And Ford plans to have a self-driving car available for ride-hailing services by 2021.