GM said it would provide payment protection (up to nine payments of $500 for new car buyers) for two years as part of its GM Total Confidence program whilst Ford unveiled its Ford Advantage plan which will cover payments for up to 12 months.
The efforts are aimed at easing buyers' concerns as the US recession continues.
GM's US sales have fallen 51.1 per cent this year (through February), and Ford's are down 45.9 per cent from year-earlier levels.
The schemes follow Hyundai, which introduced its Hyundai Assurance plan in January, and have since that time posted a 4.9 per cent sales increase.
Initially, Hyundai allowed customers to return vehicles without damaging their credit. Since then, the automaker temporarily expanded the program to include up to three months of payments.
"Hyundai has had great success getting buyers into showrooms with this kind of message, and it is certainly not unusual for automakers to copy each other's successful strategies," Edmunds' AutoObserver.com Editor Michelle Krebs said. "Now, the pressure is on the other imports that have been watching Hyundai's success and now are seeing Ford and GM rising to the occasion."