* Check the vehicle's sticker: The GVWR is usually found on a sticker located on the driver's side doorjamb or inside the glove compartment.
* Consult the owner's manual: The owner's manual will also list the GVWR.
* Use a VIN decoder: Websites and services exist that can decode the VIN (Vehicle Identification Number) to provide detailed specifications, including the GVWR.
Without knowing the specific trim level and options of the 2005 Suburban, providing a precise GVWR is impossible.