* Axle ratio: Different axle ratios affected towing capacity. A higher ratio allowed for better towing.
* Options: Additional features like a trailer tow package would increase the rated capacity. Even the presence of an auxiliary transmission cooler would make a difference.
* GVWR (Gross Vehicle Weight Rating): This is the maximum weight of the truck itself, plus passengers, cargo, and anything else on board. Towing capacity is inherently linked to this.
To find the towing capacity, you would need to locate the sticker in the vehicle itself (often found on the driver's side doorjamb or glove box) or consult the original owner's manual. Even then, the information might be general rather than exact. If you can't locate that information, contacting a Chevy parts department with your vehicle's VIN might yield the most accurate information.
In short: Expect a relatively low towing capacity compared to larger trucks. Plan on a figure likely in the range of under 2,000 lbs. but don't rely on that without confirming with the documentation or dealer.