* Engine: The specific engine (e.g., 6.5L diesel, 5.7L Vortec V8, etc.) dramatically impacts towing capability. Diesel engines generally have higher towing capacities than gasoline engines.
* Transmission: Automatic or manual transmissions also affect towing capacity.
* Axle Ratio: Higher axle ratios allow for greater towing power.
* GVWR (Gross Vehicle Weight Rating): This is the maximum weight of the truck itself, plus the passengers, cargo, and the trailer. Exceeding this is dangerous.
* GCWR (Gross Combined Weight Rating): This is the maximum weight of the truck *plus* the trailer *plus* its load. This is the most important number for safe towing.
Therefore, there is no single towing capacity for a 1997 Chevy 2500. To find the correct towing capacity for *your* specific 1997 Chevy 2500, you must locate the sticker on the driver's side doorjamb or the owner's manual. This sticker will specify the GVWR and GCWR. The GCWR is the maximum weight you should tow.
