do I need to recalculate or replace the actuator door on the passenger side or recalculate?

ID Status Date Year Make Model Transmission Type A/C Controls Public/Private
#14868 Closed 2002 Chevrolet Tahoe Z71 public

350. 5.3 Z71
Rear heater works fine. Fan works on all speeds. Will not switch to heat. Will not switch to defrost. A/C works very well.
Have not tried to recalculate YET.

Simple description in answer please.


There is not a recalibration procedure if your Tahoe has Manual a/c controls. If it has Auto a/c controls you can follow the basic procedure listed in the following linked article. The exception is that on your vehicle you would have to remove and install the Radio fuse in the underhood fuse box to start the recalibration process.


Don’t forget to also check the engine coolant. The front heater core is the highest component in the system and there will be no heat in the front if it is low.

Thank you.

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