CUSTOMER CONCERN Customer states the passenger-front and both rear power door locks do not operate, while the driver-front lock works normally. No BCM DTCs are stored. CAUSE Gray and Tan lock-circuit voltage changed correctly when commanded, confirming the passenger-front and rear door-latch actuators had failed internally. CORRECTION Remove and replace failed passenger-front and both rear door-latch actuator assemblies. Verify lock and unlock operation from both switches and