MPG by Model

MakesGMCSierra

GMC Sierra MPG

Its best-rated version reaches 26 MPG combined in 2020–2023 and 2025, the diesel Sierra 2WD. Its weakest year peaked at 16 MPG (2002–2003).

GMC Sierra: best and lowest EPA combined MPG of its versions, model years 1989–20261015202530MPG20141989199520002005201020152020202626 MPG peakGMC Sierra: best and lowest EPA combined MPG by model year1015202530MPG1989199219941996199820002002200420062008201020122014201620182020202220242026
lowest to best versionbest versionbest version is a hybridmedian of its classengine list turned over
600.0 gal

a year at 15,000 miles for the best 2026 version, the Sierra 2WD. Put it next to its 1989 predecessor, at your own mileage.

Compare in gallons

The GMC Sierra has EPA ratings for 38 model years, 1989–2026, every one of them among standard pickup trucks. Its best version had the highest combined rating among standard pickup trucks in 2009–2010, 2022–2023 and 2025, and it placed in its class top five in 18 model years. In 2025 it shared first place among 12 standard pickup trucks with the Chevrolet Silverado. In 2021 even the most efficient version of the Sierra shared the lowest rating of 11 special purpose vehicles; it sat in its class's bottom five in eight model years.

In 2004 it became one of the first two pickup nameplates with a hybrid version in EPA data. Its longest rated range, 410 miles (2026 SIERRA EV Ext Range (11kW Charger)), is the fifth longest of the 125 electric nameplates.

Among 12 standard pickup trucks, 2026

The Sierra placed first (tied). It had the highest rating in the class, shared with the Chevrolet Silverado.

Best EPA combined MPG of each of the 12 standard pickup trucks rated for 20261820222426Sierra 25median 22SilveradoBest EPA combined MPG of each of the 12 standard pickup trucks rated for 20261820222426Sierra 25median 22

Electric versions

Rated separately in kWh per 100 miles; its lowest was 49.5 kWh (2026 SIERRA EV Ext Range (11kW Charger)).

GMC Sierra: kWh per 100 miles of its most efficient electric version by model year303540455055kWh per 100 mi2025202649.5 kWh, its lowestGMC Sierra: kWh per 100 miles of its most efficient electric version by model year303540455055kWh20252026

The Sierra, five years at a time

Average rating of its best version per span, placed among standard pickup trucks.

1989–93fifth of 23
1994–98fifth of 16
1999–03seventh of 14
2004–08tenth of 19
2019–23second of 10
2024–26second of 10

Where the engine list turned over

  • 2014

    New: 4.3-liter 6-cylinder flex-fuel, 6.2-liter 8-cylinder. Best rating 21 → 20 MPG.

Powertrains under the name

  • Diesel

    Rated in 1989–1998 and 2020–2026.

  • Gasoline

    Rated in 1989–2026.

  • Flex-fuel

    Rated in 2003–2026.

  • Hybrid

    Rated in 2004–2007, 2009–2013 and 2016–2018.

  • CNG

    Rated in 2005.

  • Electric

    Rated in 2025–2026.

All 38 model years, best and lowest version
Model yearsBest versionCombinedCity / hwyLowest versionVersions
2026Sierra 2WD diesel2523 / 281522
2025Sierra 2WD diesel2623 / 291524
2024Sierra 2WD diesel2523 / 291526
2023Sierra 2WD diesel2624 / 291524
2022Sierra 2WD diesel2623 / 301434
2021Sierra 2WD diesel2623 / 301436
2020Sierra 2WD diesel2623 / 301526
2019Sierra C10 2WD2120 / 241522
2016–2018Sierra 15 Hybrid 2WD hybrid2018 / 241714
2015Sierra C15 2WD flex-fuel2018 / 241714
2014Sierra C15 2WD flex-fuel2018 / 23176
2011–2013Sierra 15 Hybrid 2WD hybrid2120 / 231412
2010Sierra 15 Hybrid 2WD hybrid2221 / 221412
2009Sierra 15 Hybrid 2WD hybrid2121 / 221420
2008Sierra C15 2WD1715 / 201412
2007Sierra C15 2WD1716 / 211427
2006Sierra 15 Hybrid 2WD hybrid1716 / 201317
2005Sierra 15 Hybrid 2WD hybrid1716 / 201117
2004Sierra 15 Hybrid 2WD hybrid1716 / 191316
2003Sierra 1500 2WD1614 / 191313
2002Sierra 1500 2WD1615 / 191212
2001Sierra 1500 2WD1715 / 201111
2000Sierra 1500 2WD1815 / 211212
1999Sierra 1500 2WD1715 / 211216
1998Sierra 1500 2WD1816 / 211318
1997Sierra 1500 2WD1815 / 211318
1996Sierra 1500 2WD1816 / 211319
1995Sierra 1500 2WD diesel1917 / 221244
1994Sierra 1500 2WD diesel1917 / 221243
1993Sierra 1500 2WD1816 / 211241
1992Sierra 1500 2WD diesel2018 / 231220
1991Sierra 1500 2WD diesel2018 / 231227
1990Sierra 1500 2WD1817 / 221223
1989Sierra 1500 2WD diesel1917 / 231224

Version names in the EPA list: Sierra 15 Hybrid 2WD, Sierra 15 Hybrid 4WD, Sierra 1500 2WD, Sierra 1500 4WD, Sierra 1500 AWD, Sierra 2500 2WD, Sierra 2500 4WD, Sierra 2500 Hd 2WD, Sierra 2500 HD 2WD CNG, Sierra 2500 HD 4WD CNG, Sierra 2WD, Sierra 2WD with Sport Mode, Sierra 4WD, Sierra 4WD AT4, Sierra 4WD AT4X, Sierra 4WD AT4X with Sport Mode, Sierra 4WD FFV, Sierra 4WD with Sport Mode, Sierra C10 2WD, Sierra C10 Cab Chassis 2WD, Sierra C10 XFE 2WD, Sierra C15 2WD, Sierra C15 Cab Chassis 2WD, Sierra C15 XFE 2WD, Sierra Cab Chassis 2WD, Sierra Cab Chassis 4WD, Sierra Classic 15 Hybrid 2WD, Sierra Classic 15 Hybrid 4WD, Sierra Classic 1500 2WD, Sierra Classic 1500 4WD, Sierra Classic 1500 AWD, Sierra Denali 1500 AWD, Sierra EV, SIERRA EV Ext Range (11kW Charger), SIERRA EV Ext Range (19kW Charger), SIERRA EV Std Range (11kW Charger), Sierra K10 4WD, Sierra K10 4WD AT4, Sierra K10 Cab Chassis 4WD, Sierra K15 4WD.

Same class, 2026

Chevrolet Silverado25 MPGFord F-15024 MPGJeep Gladiator19 MPG

Read next: Pickup trucks with the best EPA ratings by year · How to read this page