If you’re planning to tow a trailer or carry heavy cargo with your vehicle, it’s essential to know the Gross Combination Weight Rating (GCWR). GCWR is the maximum weight your vehicle can safely handle when towing a trailer or carrying cargo, including the weight of the vehicle, passengers, and all cargo. Here is a step-by-step guide on how to calculate the GCWR of your towing vehicle.

1. Determine the GVWR (Gross Vehicle Weight Rating)

The first step in calculating your GCWR is finding the Gross Vehicle Weight Rating (GVWR) of your towing vehicle. GVWR refers to the maximum weight of a fully loaded vehicle, including passengers, cargo, and any optional equipment. This information can generally be found in your vehicle’s owner’s manual or on a sticker inside the driver’s side doorjamb.

2. Determine the GTW (Gross Trailer Weight)

Now you need to determine the Gross Trailer Weight (GTW) of your trailer. The GTW consists of the weight of the trailer itself, plus any cargo or equipment being transported in/on it. Check your trailer’s manual for its maximum weight capacity and add this figure to its unloaded weight. Alternatively, you can find this information on a sticker located on the trailer or by weighing it yourself.

3. Calculate Available Payload Capacity

Subtract the towing vehicle’s specified curb weight from its GVWR to calculate its available payload capacity. The curb weight includes all fluids and fuel necessary for operation but does not include passengers or cargo.

4. Consider Passengers and Cargo Weight

Remember that passengers and cargo should also be considered when calculating GCWR. Estimate how much weight will be added by passengers and any other items that will be inside your towing vehicle (e.g., luggage, tools).

5. Ensure You Stay Within Legal Limits

In many jurisdictions, there are legal limits on the weight of vehicles and trailers allowed on public roads. Be sure to research local regulations so you don’t inadvertently exceed these restrictions.

6. Calculate Your GCWR

Finally, to calculate your vehicle’s GCWR, add the GVWR of your towing vehicle to the GTW of your trailer. If this final figure is within the specified GCWR in your vehicle’s owner’s manual or on its doorjamb sticker, then your vehicle should be able to safely tow the trailer without causing undue stress on its components or exceeding legal limitations.

In summary, calculating your vehicle’s GCWR involves identifying the GVWR (Gross Vehicle Weight Rating) and GTW (Gross Trailer Weight), considering human and cargo weight, following legal guidelines, and adding everything up. By following this step-by-step guide, you’ll ensure that you’re handling trailers and heavy cargo safely and responsibly.