Yes. Dealer tools are capable of determining if a vehicle is currently tuned.
When using an SCT device, the stock file is stored during initial programming. The stock file stays on the programmer until returned to stock. You should always return your vehicle back to stock before taking your vehicle into any auto service facility or before updating your device.
Read your vehicle’s warranty carefully before installing or using this product. You are solely responsible for determining whether the use or installation of this Product will negate or diminish any applicable warranty coverage. Under no circumstances will the Seller be liable for the voidance of all or any part of the Buyer’s vehicle warranty. Rather, the Buyer assumes all risk and responsibility if an automotive manufacturer and/or dealer voids the Buyer’s vehicle warranty in whole or in part due to the use or installation of this product.