This is part of a larger recall of 66,998 ATS sedans worldwide.
"The power-operated roof panel systems on these vehicles will auto-close when the non-recessed portion of the 'slide' or 'tilt' switches are pressed and the roof panel is open," said GM in a statement. "Because these switches are not fully recessed, they can be actuated with less force than required to comply with applicable federal standards."
The problem was discovered in the testing of a 2016 ATS in January, which uses the same switches as the previous model.
GM said it knows of no crashes, injuries or fatalities linked to the recall and has received no customer complaints.
GM Spokesman Alan Adler told Edmunds on Wednesday that a stop-delivery order to Cadillac dealers was lifted on Tuesday with the sending of the repair procedure.
"Dealers still must fix unrepaired cars before they can be sold," he said.
Dealers will replace a switch trim plate to fix the cars. A date has not been specified for the recall. Owners can contact Cadillac customer service at (800) 458-8006.
No information about the recall has been posted on the Web site of the National Highway Traffic Safety Administration, which oversees vehicle safety in the U.S.
Edmunds says: Owners should wait for their official recall notice and then schedule a service appointment with their dealer.