The Body Control Module (BCM) in a 2001 Chevy Blazer is typically located
under the dashboard, on the driver's side. However, the exact location can vary slightly depending on trim level and specific options. It's often behind a panel that requires removal to access it.
To be certain, you should consult a repair manual specific to your 2001 Chevy Blazer. These manuals often have detailed diagrams showing the location of the BCM and other components. You can find these manuals online (for purchase) or at an auto parts store.