Ratings explained
GVWR vs GCWR
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Quick answer
GVWR is the maximum weight of the loaded tow vehicle by itself. GCWR is the maximum weight of the loaded tow vehicle and the loaded trailer together. GVWR governs payload; GCWR governs how heavy a trailer the combination may pull. You have to pass both, and passing one says nothing about the other.
GVWR: the loaded vehicle on its own
Gross Vehicle Weight Rating is the maximum the tow vehicle may weigh with everything aboard — fuel, passengers, cargo, accessories, hitch hardware, and trailer tongue weight. Subtract the vehicle’s curb weight from GVWR and you have payload. It is printed on the certification label in the driver’s door jamb.
GCWR: the whole rig
Gross Combined Weight Rating is the maximum for the loaded tow vehicle plus the loaded trailer. It reflects what the powertrain, cooling system, and brakes were validated to move and stop. Subtract the actual loaded weight of the tow vehicle from GCWR and what remains is the heaviest trailer the combination is rated for.
Where tongue weight is counted
Tongue weight is the part of the trailer that rests on the hitch, so it counts against GVWR and payload. The rest of the trailer rides on its own axles and counts only against GCWR. This is why a trailer can push a vehicle over GVWR without coming anywhere near GCWR.
GAWR, the third rating nobody quotes
Each axle carries its own maximum, listed on the certification label as GAWR FRT and GAWR RR. Tongue weight lands mostly on the rear axle, so the rear GAWR can run out before GVWR does. A three-platform truck scale reports axle weights separately, which is the practical way to check it.
The mistake this distinction causes
People check the tow rating, confirm the trailer is lighter, and stop. Nothing in that check tests GVWR. A 7,000 lb trailer behind a truck rated for 11,300 lb is well inside the tow rating and can still put the truck over GVWR once a family and 910 lb of tongue weight are aboard.
Checking both in one pass
Drive the loaded rig onto a three-platform truck scale with the trailer coupled. The steer and drive platforms together give the loaded tow vehicle, to compare with GVWR, and each one separately gives an axle to compare with GAWR. All three platforms together give the combination, to compare with GCWR. One pass produces both numbers; a second pass with the truck alone adds tongue weight by subtraction.
Worked example
Worked example (hypothetical): passing GCWR and failing GVWR
A half-ton with a 7,100 lb GVWR and an 18,200 lb GCWR, weighing 5,400 lb empty, towing a 7,000 lb loaded travel trailer with a 910 lb tongue weight. Four occupants and 250 lb of gear aboard. All figures are illustrative.
| Line item | Weight | Where the number comes from |
|---|---|---|
| Curb weight | 5,400 lb | Vehicle as built |
| Four occupants | +600 lb | — |
| Cargo and hitch | +340 lb | 250 lb gear, 90 lb hitch |
| Tongue weight | +910 lb | Carried by the vehicle |
| Loaded vehicle weight | 7,250 lb | Compare with GVWR |
| GVWR | 7,100 lb | Over by 150 lb |
| Rig total for GCWR | 13,340 lb | 7,250 + 6,090 lb on the trailer axles |
| GCWR | 18,200 lb | 4,860 lb of headroom |
The combination has nearly 5,000 lb of GCWR headroom and is still 150 lb over GVWR. Checking only GCWR, or only the tow rating, would have missed it. Leaving 150 lb of gear at home brings it back to the limit; leaving one passenger behind brings it inside.
GVWR vs GCWR side by side
| GVWR | GCWR | |
|---|---|---|
| What it caps | Loaded tow vehicle alone | Loaded tow vehicle plus loaded trailer |
| Where to find it | Certification label, door jamb | Owner’s manual or towing guide; GM trailering label |
| Includes tongue weight? | Yes, in full | Yes, as part of the trailer |
| Includes trailer axle weight? | No | Yes |
| Derived figure | Payload = GVWR − curb weight | Max trailer = GCWR − loaded vehicle |
| Usually binds when | Family plus a heavy tongue weight | Heavy trailer behind a heavy vehicle |
| Varies by configuration? | By trim and body style | Strongly, by engine and axle ratio |
Both are set by the manufacturer and neither changes with aftermarket suspension, tires, or hitch upgrades.
Frequently asked questions
What is the difference between GVWR and GCWR?
GVWR is the maximum loaded weight of the tow vehicle alone. GCWR is the maximum loaded weight of the tow vehicle and trailer combined. GVWR is about carrying; GCWR is about the whole rig.
Which one limits my towing capacity?
Both can. GCWR sets how heavy a trailer the combination may pull; GVWR, through payload, sets how much tongue weight the vehicle may carry. On family setups the payload side usually binds first.
Where do I find GVWR and GCWR?
GVWR is on the certification label in the driver’s door opening. GCWR is in the owner’s manual or the manufacturer’s towing guide for your exact configuration, and recent GM trucks also print it on a trailering information label. It changes with axle ratio and tow package, so match the row to your truck.
Does trailer weight count against GVWR?
Only the tongue or pin weight does, because that is the part the vehicle carries. The rest of the trailer’s weight sits on its own axles and counts against GCWR.
What is GAWR and how does it fit in?
GAWR is the maximum weight one axle may carry. There is a separate front and rear figure on the certification label. It is possible to be under GVWR and over the rear GAWR at the same time.
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