What does the on star module in a 2002 suburban look like and where is it located?

The OnStar module in a 2002 Chevrolet Suburban is a small, rectangular electronic component, typically gray or black in color, measuring about 4 to 6 inches long. It is located under the dashboard, specifically behind the center stack or near the vehicle's fuse box. You may need to remove some trim panels to access it. The module is responsible for providing various connectivity and safety features offered by OnStar.