Chevrolet doesn't offer a separate, standalone warranty specifically for rust on the 2015 Tahoe (or any vehicle). Their warranties cover corrosion that impacts the structural integrity of the vehicle as part of their general corrosion perforation warranty, but this is usually limited in time and/or mileage. The specifics of that coverage, including duration and limitations, would be detailed in the original 2015 Tahoe's owner's manual and/or the original warranty booklet. These details vary by region.
To find the precise length of the corrosion perforation warranty coverage for your 2015 Chevrolet Tahoe, you should:
* Check your owner's manual: This is the best source of information.
* Contact a Chevrolet dealership: They can access your vehicle's warranty information using your VIN.
Keep in mind that any rust that is considered cosmetic damage (not affecting structural integrity) is typically not covered under warranty.