lennybg Posted November 24, 2025 Posted November 24, 2025 I had my battery unplugged for a few hours while i changed out the Radiator. Ever since then, the driver side vent blows cold air, while the pass side blows hot. I can change the temp of the aire blowing out of the pass side but not the driver side. I know the older trucks had a relearn procedure for the Actuators but I can find anything for the T1's Truck is a 2020 5.3
newdude Posted November 24, 2025 Posted November 24, 2025 4 minutes ago, lennybg said: I had my battery unplugged for a few hours while i changed out the Radiator. Ever since then, the driver side vent blows cold air, while the pass side blows hot. I can change the temp of the aire blowing out of the pass side but not the driver side. I know the older trucks had a relearn procedure for the Actuators but I can find anything for the T1's Truck is a 2020 5.3 Method below. If it doesn't work, I'd say the actuator failed. Alternate Method (without Scan Tool) Note: Do not operate any HVAC controls while the HVAC control module is calibrating as this may interrupt the process. If interrupted, improper HVAC performance will result. Ignition OFF/ Vehicle OFF. Remove the HVAC control module fuse for a minimum of 10 s. Install the HVAC control module fuse. Start the vehicle. Wait 40 s for the HVAC control module to self-calibrate. 1
lennybg Posted November 24, 2025 Author Posted November 24, 2025 34 minutes ago, newdude said: Method below. If it doesn't work, I'd say the actuator failed. Alternate Method (without Scan Tool) Note: Do not operate any HVAC controls while the HVAC control module is calibrating as this may interrupt the process. If interrupted, improper HVAC performance will result. Ignition OFF/ Vehicle OFF. Remove the HVAC control module fuse for a minimum of 10 s. Install the HVAC control module fuse. Start the vehicle. Wait 40 s for the HVAC control module to self-calibrate. Its very possible that I did turn the heat all the way up right after i started it up after replacing the radiator. Hoping thats what the issue is.
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