Towing Capacity by VIN: What You Can and Cannot Get

A VIN decode does not return towing capacity. NHTSA's vPIC database has no tow-rating field. See what it does return, and where the real number comes from.

By VIN Lookup Research DeskPublished 2026-08-27Reviewed 2026-08-27United States

Not returned by a VIN decodeNo NHTSA vPIC field carries this information.

No U.S. VIN decoder returns this, because NHTSA vPIC does not carry the field. Any site that claims otherwise is reading something other than the VIN.

Direct answer

A VIN decode does not return towing capacity. NHTSA's vPIC database, which free VIN lookups run on, has no towing-capacity variable among its 144 fields: it returns a GVWR weight class instead, and leaves GCWR blank on every vehicle we tested. The real tow rating comes from the manufacturer's towing guide for your exact model year, engine, cab, drive type and axle ratio.

How do I find the towing capacity from a VIN?

Decode the VIN free at https://free-vin-lookup.com/check to pin down model year, make, model, series, body class, engine displacement, drive type and GVWR class. These are the configuration facts a towing guide asks you to match. The decode will not include a tow number.
Open the driver's door and read both labels. The certification label lists GVWR and front and rear GAWR. The Tire and Loading Information placard lists tire sizes, cold inflation pressures and payload. Neither label carries a towing capacity or a GCWR.
Find the manufacturer's towing guide for that exact model year (Ford RV and Trailer Towing Guide, GM or Chevrolet Trailering Guide, Ram Towing Guide, Toyota Towing Guide) and locate the row matching your engine, cab, bed length, drive type and rear axle ratio.
Confirm the tow package and axle ratio from the window sticker, build sheet or the axle code on the door jamb label. These are not in the VIN and they are often the difference between two ratings thousands of pounds apart.
Check the hitch itself. The receiver has its own stamped weight rating, and a weight-carrying rating lower than the weight-distributing one. Your limit is whichever number in the chain is lowest: truck rating, hitch rating, or the trailer's own GVWR.
Do the arithmetic against reality. Usable trailer weight is GCWR minus the actual scale weight of your loaded truck with passengers and cargo aboard. Weigh it at a certified scale rather than working from a published curb weight.

Decode a VIN free →

Every GVWR value NHTSA's vPIC can return, taken verbatim from GetVehicleVariableValuesList/25, with what each band actually governs. GVWR is the maximum loaded weight of the vehicle alone. It is not a towing capacity, and vPIC returns the band rather than the vehicle's exact GVWR in pounds.

vPIC GVWR value (verbatim)	Weight range	Typical vehicles	What this rating governs
Class 1A: 3,000 lb or less (1,360 kg or less)	up to 3,000 lb	Microcars, subcompacts, some motorcycles	Below every federal commercial weight threshold. Most vehicles here are unrated for towing.
Class 1B: 3,001 - 4,000 lb (1,360 - 1,814 kg)	3,001 - 4,000 lb	Compact cars and small hatchbacks	Light duty. Where a tow rating exists at all it is typically 1,000 to 2,000 lb, set by the maker, not by the class.
Class 1C: 4,001 - 5,000 lb (1,814 - 2,268 kg)	4,001 - 5,000 lb	Midsize sedans, compact crossovers	Light duty. Common band for crossovers rated roughly 1,500 to 3,500 lb in the towing guide.
Class 1D: 5,001 - 6,000 lb (2,268 - 2,722 kg)	5,001 - 6,000 lb	Large sedans, midsize SUVs, small EVs	Light duty. The class band says nothing about the tow rating, which varies by drivetrain and tow package.
Class 1: 6,000 lb or less (2,722 kg or less)	up to 6,000 lb	Most passenger cars, including EVs	The coarse band vPIC returns for the majority of passenger cars. Under every federal commercial threshold.
Class 2E: 6,001 - 7,000 lb (2,722 - 3,175 kg)	6,001 - 7,000 lb	Midsize pickups, midsize and large SUVs	Light duty. Still well below the 10,001 lb line at which FMCSA commercial rules begin.
Class 2F: 7,001 - 8,000 lb (3,175 - 3,629 kg)	7,001 - 8,000 lb	Half-ton pickups (F-150, Silverado 1500, Tundra)	The most common pickup band. Non-commercial by weight, and the band where axle ratio and tow package swing the rating most.
Class 2G: 8,001 - 9,000 lb (3,629 - 4,082 kg)	8,001 - 9,000 lb	Heavy half-tons, cargo vans, three-quarter-tons	Light duty. Some states begin applying commercial registration rules above 8,000 lb; federal rules do not.
Class 2H: 9,001 - 10,000 lb (4,082 - 4,536 kg)	9,001 - 10,000 lb	Three-quarter-ton pickups, heavy vans	The top of light duty. At 10,000 lb the vehicle sits immediately below the federal commercial motor vehicle line.
Class 2: 6,001 - 10,000 lb (2,722 - 4,536 kg)	6,001 - 10,000 lb	Pickups, full-size SUVs and vans	The coarse band vPIC returns when it does not hold the finer 2E through 2H detail for that vehicle.
Class 3: 10,001 - 14,000 lb (4,536 - 6,350 kg)	10,001 - 14,000 lb	One-ton pickups (F-350, Ram 3500, Silverado 3500)	The first class at or above 10,001 lb. In interstate commerce this meets FMCSA's commercial motor vehicle definition under 49 CFR 390.5.
Class 4: 14,001 - 16,000 lb (6,350 - 7,258 kg)	14,001 - 16,000 lb	Cutaway chassis, Class C motorhomes, box trucks	Medium duty. Commercial operation triggers DOT number, driver qualification and inspection requirements. No CDL needed.
Class 5: 16,001 - 19,500 lb (7,258 - 8,845 kg)	16,001 - 19,500 lb	Larger box trucks, bucket trucks, big motorhomes	Medium duty. Still under the 26,001 lb single-vehicle CDL threshold.
Class 6: 19,501 - 26,000 lb (8,845 - 11,794 kg)	19,501 - 26,000 lb	Medium-duty trucks (Freightliner M2, International MV)	The top of the non-CDL range: a single vehicle rated 26,000 lb or less needs no commercial driver's license.
Class 7: 26,001 - 33,000 lb (11,794 - 14,969 kg)	26,001 - 33,000 lb	City delivery trucks, refuse trucks, some tractors	Above the CDL line. A single vehicle in this class requires a Class B CDL to drive.
Class 8: 33,001 lb and above (14,969 kg and above)	33,001 lb and up	Truck-tractors (Freightliner Cascadia), heavy dumps	Heavy duty. A Class A CDL applies once the combination exceeds 26,001 lb GCWR and the towed unit exceeds 10,000 lb.

Where the VIN route stops for towing capacity

vPIC has no towing-capacity variable at all. GetVehicleVariableList returns 144 variables, and none of them covers tow rating, tongue weight, hitch class or trailer weight rating. There is no field to be blank.
GCWR and GCWR_to do exist as vPIC variables (IDs 184 and 185) with the same class-band vocabulary as GVWR, but both came back empty on every vehicle we decoded, including a 2022 Ford F-350, a 2020 Ram 3500, a 2015 Freightliner M2 and a 2012 Freightliner Cascadia truck-tractor.
GVWR is returned as a band, not a number. A 2013 Ford F-150 decodes as 'Class 2F: 7,001 - 8,000 lb' — a 1,000-pound window, not the truck's actual GVWR. GVWR is also not universal: a 2021 Nissan Titan returned it blank.
CurbWeightLB was empty on every vehicle we tested, passenger cars and heavy trucks alike, so you cannot even derive a payload estimate from a vPIC decode.
Rear axle ratio, trailer-tow package and hitch type — the three variables that move a pickup's tow rating the most — are not vPIC variables and are not encoded in the VIN's standardized positions. They live on the window sticker and in the manufacturer's build data.

Where to get it instead

The manufacturer's towing guide for that model year. The only authoritative per-configuration tow rating. Every major brand publishes a yearly PDF (Ford RV and Trailer Towing Guide, GM and Chevrolet Trailering Guide, Ram Towing Guide, Toyota Towing Guide) with rows keyed to engine, cab, bed, drive type and rear axle ratio. The owner's manual towing chapter carries the same figures plus maximum tongue weight.
The driver's door certification label — GVWR and GAWR. Required by 49 CFR Part 567, this label gives the vehicle's actual GVWR in pounds rather than the class band vPIC returns, plus front and rear gross axle weight ratings. It does not show towing capacity or GCWR, but GVWR minus your loaded weight is the honest ceiling on what the truck itself can carry. Source →
The Tire and Loading Information placard — payload. Required by FMVSS 110 (49 CFR 571.110), this placard on the driver's door jamb gives tire sizes, cold inflation pressures and the combined weight of occupants and cargo the vehicle can carry. Trailer tongue weight counts against that payload number, which is why payload, not tow rating, is the limit most people actually hit first. Source →
A certified scale plus the published GCWR. Weigh the truck loaded as you will tow it — passengers, fuel, gear, hitch — at a CAT or public certified scale. Subtract that figure from the GCWR in the towing guide and you have the real trailer weight you can pull, which is almost always below the headline maximum the brand advertises.

Evidence

Primary sources

Open the underlying public source and verify that its scope matches the question you are asking.

Quick answers

Towing Capacity by VIN: What You Can and Cannot Get — questions

How can I find out the towing capacity of my vehicle for trailers and RVs?

Use the manufacturer's towing guide for your exact model year, not a VIN decoder. Decode the VIN first to confirm year, make, model, series, engine and drive type, then match that configuration in the towing guide or the owner's manual towing chapter. For an RV, also check the hitch receiver's stamped rating and the trailer's own GVWR. The lowest number in that chain is your real limit.

Does a free VIN decoder show towing capacity?

No. Free decoders read NHTSA's vPIC database, and vPIC has no towing-capacity variable. Its 144 fields cover build data such as make, model, engine, body class, GVWR class and assembly plant, not performance ratings. A site showing a tow number beside a VIN is pulling it from a separate commercial specification database or estimating it from the model, not decoding it from the VIN.

Is towing capacity on the door jamb sticker?

No. The driver's door jamb carries two labels and neither is a tow rating. The certification label required by 49 CFR Part 567 lists GVWR and front and rear GAWR. The Tire and Loading Information placard required by FMVSS 110 lists tire sizes, cold inflation pressures and payload, the combined weight of occupants and cargo. Towing capacity lives in the owner's manual and towing guide.

What is the difference between GVWR, GCWR, payload and towing capacity?

GVWR is the maximum loaded weight of the truck by itself. GCWR is the maximum for truck and trailer combined. Payload is GVWR minus curb weight, covering people, cargo and trailer tongue weight. Towing capacity is roughly GCWR minus the truck's actual loaded weight. A vPIC decode returns a GVWR class band and leaves GCWR, curb weight and payload blank.

Can I calculate towing capacity from the GVWR a VIN decode returns?

No. GVWR describes only the truck's own loaded weight, and vPIC returns it as a band such as Class 2F: 7,001 to 8,000 lb, a 1,000-pound window. Towing capacity depends on GCWR, which vPIC leaves blank, plus rear axle ratio, hitch type and tow package. Two pickups that decode identically can be thousands of pounds apart.

Why do two trucks of the same year and model have different tow ratings?

Rear axle ratio, trailer-tow package, cab and bed configuration, drive type and hitch type all move the number, and only drive type appears reliably in a VIN decode. A 3.55 and a 3.73 rear axle on the same F-150 can differ by thousands of pounds. The window sticker or build sheet, not the VIN, tells you which options the truck actually left the plant with.

What is SAE J2807 and does it matter when comparing tow ratings?

SAE J2807 is the standardized tow-rating test the major brands adopted for light-duty pickups by roughly the 2015 model year, with Toyota moving earlier. Before it, each manufacturer measured tow capacity its own way and the numbers were not comparable across makes. When you compare guides from different model years, check whether both ratings are J2807-based, because some earlier figures were restated downward.

Where do I find my truck's GCWR if the VIN decode leaves it blank?

The owner's manual towing section and the manufacturer's towing guide both list GCWR by configuration. Some heavy-duty trucks also carry a trailer weight rating label on the door frame or in the glove box. vPIC defines GCWR as variables 184 and 185 and publishes the same class bands it uses for GVWR, but returned it empty for every vehicle we decoded, including a Class 8 truck-tractor.