It sounds like you’re experiencing a concerning issue with your Chevy Silverado 2500 HD. From your description, it appears that there might be a problem with the braking system. It’s wise to avoid driving the truck until the issue is resolved, especially considering the potential safety risks.
You mentioned contacting OnStar, which is a good step. They can help diagnose the problem remotely and possibly assist in towing the vehicle to a service center for inspection and repairs. Given the symptoms you’ve described—sudden stopping, difficulty maneuvering, and the sensation of brakes engaging when turning—it’s crucial to have a professional examine the braking system thoroughly.
Safety should always be a priority, and it’s commendable that you’re taking precautions by not driving the truck until the issue is resolved. Once the experts diagnose the problem, they can provide guidance on the necessary repairs to ensure the safe operation of your vehicle.