GMC Sierra vs Ram 1500
The GMC Sierra is the more efficient of the two: it reaches 68 mpg combined versus 26 mpg for the Ram 1500, a 42 mpg advantage and costs about $1,550 less per year to fuel.
Across 5 measured categories, the GMC Sierra leads in 4. Figures are EPA test data, not manufacturer claims.
2015–2026
GMC Sierra
Standard Pickup Trucks 4WD · 274 configurations
2015–2027
Ram 1500
Standard Pickup Trucks 4WD · 142 configurations
Head-to-head specifications
| Metric | GMC Sierra | Ram 1500 |
|---|---|---|
| Best combined MPG | 68 mpg ✓ | 26 mpg |
| Best city MPG | 75 mpg ✓ | 23 mpg |
| Best highway MPG | 61 mpg ✓ | 33 mpg |
| Lowest annual fuel costEPA estimate at 15,000 miles per year | $1,100 ✓ | $2,650 |
| Lowest CO2 output | 392 g/mi | 384 g/mi ✓ |
| Engines offered | SIDI, 3.0, SIDI; FFV, SIDI; with Sport Mode | Mild Hybrid, SIDI, 5.7, 6.2 |
| Transmissions | Automatic (A1), Automatic 10-spd, Automatic 8-spd | Automatic 8-spd, Automatic 6-spd |
| Drivetrains | 4-Wheel Drive, Rear-Wheel Drive | 4-Wheel Drive, Rear-Wheel Drive, All-Wheel Drive |
| Fuel types | Electricity, Regular, Diesel | Regular, Premium, Midgrade |
| EPA class | Standard Pickup Trucks 4WD | Standard Pickup Trucks 4WD |
| Years covered | 2015–2026 | 2015–2027 |
| Configurations on record | 274 | 142 |
Source: EPA fuel economy records via fueleconomy.gov. Best-case values across all recorded configurations for each model.
Sierra vs 1500: common questions
Which is better on gas, the GMC Sierra or the Ram 1500?
The GMC Sierra is the more efficient of the two: it reaches 68 mpg combined versus 26 mpg for the Ram 1500, a 42 mpg advantage and costs about $1,550 less per year to fuel.
Which costs less to run per year?
By EPA estimates at 15,000 miles a year, the GMC Sierra runs about $1,100 a year in fuel at its most efficient configuration, versus about $2,650 for the Ram 1500 — a difference of roughly $1,550 per year.
What engines do the Sierra and 1500 offer?
GMC Sierra: SIDI, 3.0, SIDI; FFV, SIDI; with Sport Mode. Ram 1500: Mild Hybrid, SIDI, 5.7, 6.2.
Are they in the same vehicle class?
Yes — the EPA classifies both the GMC Sierra and the Ram 1500 as Standard Pickup Trucks 4WD, so they compete directly.
More Sierra comparisons
Comparison id: gmc-sierra-vs-ram-1500