The power door lock actuators may become slow to operate or stop working completely and require replacement.
Car Problem Reports
Chevrolet Suburban 2500 Power Door Lock Actuators May Fail
Chevrolet Suburban 2500 Problem
Average Mileage: 89,000 mi (78,000 mi - 100,000 mi)
Visitor, 1999 Chevrolet Suburban 2500, 100,000 mi
2 passenger door locks and the rear door lock all failed.