Where is the transfer case control module in a 2001 GMC Yukon and how do you replace it?

The transfer case control module in a 2001 GMC Yukon is typically located on the driver's side, mounted on the frame rail near the transfer case. To replace it, first disconnect the battery, then remove any necessary panels or covers to access the module. Unplug the electrical connectors, unbolt the module from its mounting bracket, and install the new module by reversing the removal process. Finally, reconnect the battery and check for proper operation.