Where is the transfer case control module on a 2004 Chevy Avalanche?

The transfer case control module (often called the transfer case control module or TCM) on a 2004 Chevy Avalanche isn't a standalone, easily identifiable box like some other vehicle components. Instead, its functionality is integrated into the body control module (BCM).

Therefore, you won't find a separate "transfer case control module". The BCM handles the signals and commands for the transfer case, along with many other vehicle systems. The BCM is typically located underneath the dashboard, on the driver's side. Accessing it often requires removing parts of the dashboard. A repair manual specific to your year and model Avalanche will be needed for accurate location and removal instructions.