2025 GMC Sierra 2500HD vs 2025 Ram 3500
The GMC Sierra 2500HD wins clearly, 97.8 to 69.5, on safety.
2025 GMC Sierra 2500HD
The 2025 GMC Sierra 2500HD is a pickup truck; vehicles over 8,500 lb GVWR are not certified for fuel economy by the EPA, so this page is built from NHTSA's reca…
2025 Ram 3500
The 2025 Ram 3500 is a pickup truck; vehicles over 8,500 lb GVWR are not certified for fuel economy by the EPA, so this page is built from NHTSA's recall, compl…
2025 GMC Sierra 2500HD
Clear winThe GMC Sierra 2500HD wins clearly, 97.8 to 69.5, on safety.
| Category · weight | 2025 GMC Sierra 2500HDoverall 97.8 | 2025 Ram 3500overall 69.5 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Pricenot compared | Specs not available | Specs not available | |||||||||
| Fuel & rangenot compared | No data | No data | |||||||||
| Safetyw 4 | 97.8 | 69.5 | |||||||||
NHTSA 5-Star rating, WhichTrim Safety Signal (open recalls by severity), owner complaints, standard driver-assist features (from the press kit, or from what the manufacturer filed with NHTSA where there is none). Open park-outside / do-not-drive advisories cost 25 points. | |||||||||||
| Space & cargonot compared | Specs not available | Specs not available | |||||||||
| Performancenot compared | Specs not available | Specs not available | |||||||||
| Tech & comfortnot compared | Specs not available | Specs not available | |||||||||
| Warrantynot compared | Specs not available | Specs not available | |||||||||
| Overall | 97.8 | 69.5 | |||||||||
Safety-only comparison · 1 of 7 categories compared · specs not available for Ram 3500
GMC Sierra 2500HD: base trim Pro 2WD · Ram 3500: safety only (EPA and NHTSA record; specs not available). Pick a trim in the tool to compare any other trim.
Where the gap is
the biggest differences, from the scorecard's own numbersWhere the 2025 GMC Sierra 2500HD wins
- It has drawn fewer owner complaints (28 against 43 filed with NHTSA).
- It has the cleaner recall record (Safety Signal 97 against 71).
Ranked by how far apart the two score on each measure, so a price gap and a horsepower gap are compared on the same scale. Every figure is on this page.
Specifications side by side
37 specs · manufacturer press kits| Spec | GMC Sierra 2500HDPro 2WD | Ram 3500 |
|---|---|---|
| Engine Basics | ||
| Aspiration | naturally aspirated | — |
| Cylinder count | 8 | — |
| Engine displacement | 6,600 cc | — |
| Engine type (full description) | 6.6L V-8 gasoline or E85 FlexFuel | — |
| Fuel injection system | gdi mpi | — |
| Valve configuration | Overhead-valve, two valves per cylinder, variable valve timing | — |
| Engine Output | ||
| Horsepower | 401 hp | — |
| Torque | 464 lb-ft | — |
| Transmission | ||
| Final drive ratio | 3.73 | — |
| Transmission speeds | 10 | — |
| Transmission type | automatic | — |
| Dimensions Exterior | ||
| Ground clearance | 10.2 in | — |
| Overall height | 79.9 in | — |
| Overall length | 237 in | — |
| Overall width | 81.8 in | — |
| Wheelbase | 142 in | — |
| Headroom | ||
| Front headroom | 43.1 in | — |
| Second-row headroom | 39.9 in | — |
| Legroom | ||
| Front legroom | 44.5 in | — |
| Second-row legroom | 35.2 in | — |
| Weights | ||
| Curb weight (maximum) | 7,428 lbs | — |
| Curb weight (minimum) | 6,203 lbs | — |
| Gross vehicle weight rating | 11,000 lbs | — |
| Payload capacity | 3,759 lbs | — |
| Suspension | ||
| Front suspension type | Short long arms independent front suspension with torsion bars | — |
| Rear suspension type | Semi-elliptic, two-stage, multi-leaf springs | — |
| Steering | ||
| Steering type | Hydraulic power-assisted recirculating ball | — |
| Brakes | ||
| Front brake diameter | 355 mm | — |
| Front brake type | ventilated disc | — |
| Rear brake diameter | 360 mm | — |
| Rear brake type | solid disc | — |
| Wheels | ||
| Wheel diameter | 17 in | — |
| Wheel material | steel | — |
| Tires | ||
| Tire size | LT245/75R17E ALS | — |
| Fuel System | ||
| Fuel tank capacity | 36 gal | — |
| Shoulder Room | ||
| Front shoulder room | 66.1 in | — |
| Second-row shoulder room | 64.9 in | — |
Green marks the better value where the direction is unambiguous (more room, more power, lower price). Blank rows are specs the press kit does not publish.
Equipment, feature by feature
12 features · differences first, then sharedSafety6 differ · 6 listed
| Feature | GMC Sierra 2500HDPro 2WD | Ram 3500 |
|---|---|---|
| ABS and Stabilitrak electronic stability assist | std | — |
| ABS and Stabilitrak electronic stability assist | std | — |
| ABS and Stabilitrak electronic stability assist | std | — |
| Front and Rear Park Assist (now available on Pro and SLE trims) | opt | — |
| Hydraulic power-assisted Hydroboost brake booster, four-wheel disc brakes | std | — |
| Sierra HD Pro Safety Plus Package (includes Front & Rear Park Assist) | opt | — |
Powertrain3 differ · 3 listed
| Feature | GMC Sierra 2500HDPro 2WD | Ram 3500 |
|---|---|---|
| 6.6L V-8 gasoline or E85 FlexFuel engine (401 hp / 464 lb-ft) | std | — |
| Allison 10L1000 10-speed automatic transmission | std | — |
| Duramax 6.6L V-8 Turbo-Diesel engine (470 hp / 975 lb-ft) | opt | — |
Chassis1 differ · 1 listed
| Feature | GMC Sierra 2500HDPro 2WD | Ram 3500 |
|---|---|---|
| Short long arms independent front suspension with torsion bars | std | — |
Cargo2 differ · 2 listed
| Feature | GMC Sierra 2500HDPro 2WD | Ram 3500 |
|---|---|---|
| Max Towing Package (NHT) – increases diesel conventional tow rating to 20,000 lb on qualifying configurations | opt | — |
| Trailer Brake Controller (standard across all trims) | std | — |
Highlighted rows are where the two differ. Wording is the manufacturer's own.
Safety record
NHTSA recalls, complaints, NCAPGMC Sierra 2500HD
Top recalls
- minor Tires 26V530000 · 8 vehicles
Ram 3500
Top recalls
- high Electrical System 26V225000 · 65,348 vehicles
- high Electrical System 26V059000 · 456,287 vehicles
- high Air Bags 25V882000 · 52,565 vehicles
- high Power Train 25V297000 · 778 vehicles
- moderate Electrical System 25V826000 · 72,509 vehicles
Ownership
EPA, manufacturer warranty| GMC Sierra 2500HDPro 2WD | Ram 3500 | |
|---|---|---|
| Price | — (base trim) | — |
| Price range across trims | — 10 trims | — |
| Powertrains | GAS | — |
| EPA configuration compared | — | — |
| Combined mpg / MPGe | — | — |
| EPA annual fuel cost | — | — |
| EV range | — | — |
| Basic warranty | — | — |
| Powertrain warranty | — | — |
| Roadside assistance | — | — |
Common questions
Source: EPA, NHTSA and manufacturer press kitsWhich is better, the 2025 GMC Sierra 2500HD or the 2025 Ram 3500?
The GMC Sierra 2500HD wins clearly, 97.8 to 69.5, on safety. On WhichTrim's default weights the 2025 GMC Sierra 2500HD scores 97.8 and the 2025 Ram 3500 69.5. The weights are yours to change — move what you care about and the verdict recalculates on the page.
Which has the better safety record, the 2025 GMC Sierra 2500HD or the 2025 Ram 3500?
2025 GMC Sierra 2500HD: no NHTSA rating yet, grade A, 1 recall. 2025 Ram 3500: no NHTSA rating yet, grade C, 5 recalls. Crash ratings come from NHTSA's own tests; the grade is WhichTrim's read of the recall record, and the two can disagree.
What are the biggest differences between the 2025 GMC Sierra 2500HD and the 2025 Ram 3500?
Where the 2025 GMC Sierra 2500HD wins: it has drawn fewer owner complaints (28 against 43 filed with NHTSA) and has the cleaner recall record (Safety Signal 97 against 71).