Where is the onstar module in a 2003 Chevrolet suburban?

The OnStar module in a 2003 Chevrolet Suburban is typically located underneath the driver's side of the dashboard. 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. You'll likely need to consult a repair manual specific to your year and model Suburban to pinpoint the precise location and removal procedure. A service manual will have diagrams showing the location.