2026 GMC Sierra

Truck Regular
GMC Sierra 2026
25MPG Combined
5 Trims
← 2025 2026
Updated February 27, 2026

The 2026 GMC Sierra Truck provides 16–25 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.

2026 GMC Sierra Specifications

SpecValue
Combined MPG16–25 combined MPG depending on trim
City MPG23
Highway MPG28
Body StyleTruck
Fuel TypeRegular
DriveRWD
Available Trims5

Available Trims

TrimMPG (City/Hwy/Combined)EngineTransmission
Auto16/20/175.3L 8cylAutomatic 10-spd
Auto23/28/253.0L 6cylAutomatic 10-spd
Auto15/19/166.2L 8cylAutomatic 10-spd
Auto15/18/165.3L 8cylAutomatic 10-spd
Auto22/26/243.0L 6cylAutomatic 10-spd

Annual Fuel Cost

Based on EPA estimates, the 2026 GMC Sierra costs approximately $2,700 per year in fuel. This assumes 15,000 miles driven annually and current fuel prices.

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