To find the exact GCWR for your specific 1999 F-350 Crew Cab, you need to:
* Check the sticker: Look for the sticker on the driver's side doorjamb or the glove compartment. This sticker lists the GVWR (Gross Vehicle Weight Rating), GAWR (Gross Axle Weight Rating - front and rear), and GCWR for your *specific* truck. This is the most reliable source.
* Consult your owner's manual: The owner's manual should also specify the GCWR.
Without knowing the specific configuration of your truck, it's impossible to give you a definitive answer.