To find the GVWR for *your* specific 2013 Chevrolet Suburban, you should:
* Check the sticker on the driver's side doorjamb: This sticker will list the GVWR and other important weight information.
* Consult your owner's manual: The owner's manual will also specify the GVWR.
* Use the VIN: You can use the vehicle identification number (VIN) to look up the specifications online through a reliable vehicle information website (many are subscription based), or contact a Chevrolet dealership.
Without knowing the exact trim and configuration of your specific 2013 Suburban, I cannot provide the GVWR.