What gas does the 2026 GMC Sierra 1500 take?
It depends on the engine: regular gasoline for the 2.7L 4-cylinder turbo and 5.3L 8-cylinder; diesel for the 3.0L 6-cylinder turbo diesel; premium gasoline for the 6.2L 8-cylinder. The 5.3L 8-cylinder is flex-fuel and can also run on E85. An electric version is also listed.
Key takeaways
- 9 EPA-certified configurations listed for the 2026 GMC Sierra 1500.
- Rated on premium: if the owner's manual says premium required, use premium; if it says recommended, regular works with some loss of power and economy.
- Only the engines marked flex-fuel can use E85.
| Engine | Transmission | Drive | Rated fuel | E85 |
|---|---|---|---|---|
| Electric (EV) | single-speed (direct drive) | 4WD | electricity | No |
| 2.7L 4-cylinder turbo | 8-speed automatic | 4WD | regular gasoline | No |
| 2.7L 4-cylinder turbo | 8-speed automatic | RWD | regular gasoline | No |
| 3.0L 6-cylinder turbo diesel | 10-speed automatic | 4WD | diesel | No |
| 3.0L 6-cylinder turbo diesel | 10-speed automatic | RWD | diesel | No |
| 5.3L 8-cylinder | 10-speed automatic | 4WD | regular gasoline | Yes (flex-fuel) |
| 5.3L 8-cylinder | 10-speed automatic | 4WD | regular gasoline | No |
| 5.3L 8-cylinder | 10-speed automatic | RWD | regular gasoline | No |
| 6.2L 8-cylinder | 10-speed automatic | 4WD | premium gasoline | No |
Source: U.S. EPA / DOE fuel economy data (fueleconomy.gov). Each row is one certified configuration; a trim or option not sold in a configuration is not listed.
Useful for the 2026 GMC Sierra 1500
As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.