No heat

Hi, my name is Devin. I am an auto repair expert with the Car Genius team here at RepairPal. I'm sorry to hear you're having trouble with your Silverado. Since you've flushed the system and replaced the actuator motors, and the blower motor is working well, the issue may be with the heater core or the blend door itself. The heater core could be partially clogged, restricting the flow of hot coolant enough to reduce cabin heat output. Another possibility is a malfunctioning thermostat, which could prevent the engine from reaching the proper temperature to provide heat. If you need more advice, have any other questions about your vehicle, or would like to get connected to a RepairPal Certified shop near you, we have you covered. Give us a call at 877-913-1554, and we will happily help you out!