2020 GMC Sierra Cab Chassis
17MPG
Combined
4
Trims
2020
2021 →
Updated February 27, 2026
The 2020 GMC Sierra Cab Chassis Special Purpose Vehicle 2WD provides 15–17 combined MPG depending on trim. We’ve compiled EPA fuel economy data, NHTSA safety ratings, and recall history so you can make an informed decision.
2020 GMC Sierra Cab Chassis Specifications
| Spec | Value |
|---|---|
| Combined MPG | 15–17 combined MPG depending on trim |
| City MPG | 15 |
| Highway MPG | 19 |
| Body Style | Special Purpose Vehicle 2WD |
| Fuel Type | Regular |
| Drive | RWD |
| Available Trims | 4 |
Available Trims
| Trim | MPG (City/Hwy/Combined) | Engine | Transmission |
|---|---|---|---|
| Auto | 15/19/17 | 4.3L 6cyl | Automatic 6-spd |
| Auto | 14/18/15 | 5.3L 8cyl | Automatic 6-spd |
| Auto | 14/16/15 | 4.3L 6cyl | Automatic 6-spd |
| Auto | 14/17/15 | 5.3L 8cyl | Automatic 6-spd |
Annual Fuel Cost
Based on EPA estimates, the 2020 GMC Sierra Cab Chassis costs approximately $2,862 per year in fuel. This assumes 15,000 miles driven annually and current fuel prices.
Compare the 2020 GMC Sierra Cab Chassis
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Other Model Years
- 2026 GMC Sierra Cab Chassis
- 2025 GMC Sierra Cab Chassis
- 2024 GMC Sierra Cab Chassis
- 2023 GMC Sierra Cab Chassis
- 2022 GMC Sierra Cab Chassis
- 2021 GMC Sierra Cab Chassis
- 2020 (this page)
Check Vehicle History
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