November and December saw record-high delinquency rates on subprime auto loans and may signal even more consumers will fall behind on payments in January and February. To compensate, lenders may restrict credit access further for subprime borrowers in 2020, Cox Automotive said.

Ally's auto originations dipped slightly in the fourth quarter despite higher lease originations and loans for General Motors vehicles.

Dealerships should educate customers about fraudulent credit repair tactics and make sure borrowers are improving their credit profiles legally.

A series of leadership shifts, including COO Kyle Birch's promotion to president of North America, will lead to more coordination between GM Financial and GM.