2021 Chevrolet Silverado 4WD TrailBoss
18MPG
Combined
8
Trims
← 2020
2021
Updated February 27, 2026
Get the full picture on the 2021 Chevrolet Silverado 4WD TrailBoss. As a Truck, it achieves 15–18 combined MPG depending on trim and has not yet been rated by NHTSA. Below you’ll find detailed specs for every trim, plus recall information and competitor comparisons.
2021 Chevrolet Silverado 4WD TrailBoss Specifications
| Spec | Value |
|---|---|
| Combined MPG | 15–18 combined MPG depending on trim |
| City MPG | 16 |
| Highway MPG | 21 |
| Body Style | Truck |
| Fuel Type | Regular |
| Drive | 4WD |
| Available Trims | 8 |
Available Trims
| Trim | MPG (City/Hwy/Combined) | Engine | Transmission |
|---|---|---|---|
| Auto | 14/18/16 | 5.3L 8cyl | Automatic 6-spd |
| Auto | 16/21/18 | 5.3L 8cyl | Automatic 10-spd |
| Auto | 14/18/16 | 4.3L 6cyl | Automatic 6-spd |
| Sport | 15/19/17 | 6.2L 8cyl | Automatic 10-spd |
| Auto | 15/19/17 | 6.2L 8cyl | Automatic 10-spd |
| Auto | 13/18/15 | 5.3L 8cyl | Automatic 6-spd |
| Auto | 14/19/16 | 6.2L 8cyl | Automatic 10-spd |
| Auto | 15/21/17 | 5.3L 8cyl | Automatic 10-spd |
Annual Fuel Cost
Based on EPA estimates, the 2021 Chevrolet Silverado 4WD TrailBoss costs approximately $3,006 per year in fuel. This assumes 15,000 miles driven annually and current fuel prices.
Compare the 2021 Chevrolet Silverado 4WD TrailBoss
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Other Model Years
- 2021 (this page)
- 2020 Chevrolet Silverado 4WD TrailBoss
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