There's no single answer to the basic warranty on a 2003 Cadillac Escalade EXT. The original warranty from General Motors would have expired long ago. The original warranty likely covered a limited period (typically 3 years/36,000 miles) for the vehicle and a longer period (sometimes 5 years/50,000 miles) for powertrain components. These are just estimates and the precise terms would have depended on the specific details of the original sale and any extended warranties purchased.
In short: Any original warranty on a 2003 Cadillac Escalade EXT is definitively expired. To know about any remaining coverage, you'd need to examine any extended warranties that might have been purchased at the time of sale or subsequently.
