2021 Chevrolet Silverado 1500 3.0L Duramax Diesel Specs
4th gen (T1) · Updated Sep 2026
- Horsepower
- 277 hp
- 460 lb-ft
- Max towing
- 9,500 lb
- properly equipped
- Oil capacity
- 7.0 qt
- with filter
- Oil type
- SAE 0W-20 (dexosD)
- Tire size
- P255/70R17
- MPG combined
- 27 mpg
Specs #specs
The 2021 Chevrolet Silverado 1500 3.0L Duramax Diesel makes 277 hp at 3,750 rpm and 460 lb-ft of torque at 1,500 rpm.
The 2021 Chevrolet Silverado 1500 3.0L Duramax Diesel can tow up to 9,500 lb when properly equipped.
| Horsepower | 277 hp @ 3,750 rpm |
|---|---|
| Torque | 460 lb-ft @ 1,500 rpm |
| Transmission | 10-speed automatic |
| Drivetrain | 2WD or 4WD |
| Max towing | 9,500 lb |
Engine #engine
| Engine | Duramax 3.0L Turbo-Diesel I6 (LM2) |
|---|---|
| Engine code | LM2 |
| Displacement | 3.0 L |
| Cylinders | I6 |
| Aspiration | Turbocharged |
| Fuel | Diesel |
Oil capacity & fluids #oil-capacity
The 2021 Chevrolet Silverado 1500 3.0L Duramax Diesel takes 7.0 quarts of SAE 0W-20 (dexosD) oil with a filter change.
| Engine oil (with filter) | 7.0 qt |
|---|---|
| Oil type | SAE 0W-20 (dexosD) |
| Coolant | 20.5 qt |
| Diesel exhaust fluid | 5.3 gal |
| Transfer case (4WD) | 1.6 qt |
| Fuel tank | 22.0 gal (2WD), 24.0 gal (4WD) |
Wheels & tires #tire-size
The 2021 Chevrolet Silverado 1500 3.0L Duramax Diesel comes with P255/70R17 tires.
| Tire size | P255/70R17 |
|---|---|
| Wheel size | 17 in (LT) |
| Lug nut torque | 140 lb-ft |
Fuel economy #mpg
| City | Highway | Combined | |
|---|---|---|---|
| 2WD | 23 | 33 | 27 |
| 4WD | 22 | 26 | 24 |
8 recalls for the 2021 Chevrolet Silverado 1500 →
FAQ
How much oil does the 2021 Silverado 3.0 Duramax take?
The 3.0L Duramax takes 7.0 quarts of dexosD SAE 0W-20 including the oil filter.
What MPG does the 2021 Silverado diesel get?
The EPA rates the 3.0L Duramax at 27 mpg combined (23 city / 33 highway) as a 2WD and 24 mpg combined as a 4WD.
Sources: 2021 Chevrolet Silverado 1500 Owner's Manual, 2021 Chevrolet/GMC 3.0L Duramax Diesel Engine Supplement, 2021 Silverado 1500 Max Trailering chart (Chevrolet), 2021 Chevrolet Silverado 1500 brochure, EPA fueleconomy.gov, NHTSA recalls. Updated Sep 2026.