Hi guys, new to this group. Originally I was searching for information on the heater resistor recall on my 2005 Yukon Denali XL. Currently, I have to pull the fuse in order for my heater (blower) to shut off...even with key out of the ignition.
Might be a relay is not turning off. It might be under the hood, in that fuse/relay panel.
I know nothing about wehicles this new so that is just a suggested guess. if You find the relay, try removing it and see if the blower is shut down with the key on. Sometimes there are other relays with the same part number, You can try switching them around and see what happens.
I take no responsibility if something goes awry in the described procedure. LOL
Welcome to thetruckstop.