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Chevrolet Silverado vs GMC Sierra: fuel economy and fuel cost

In model year 2026 the Chevrolet Silverado and the GMC Sierra cost the same to fuel: about $3,340 a year for the lowest-cost configuration of each (Silverado, 20 MPG combined, and Sierra, 20 MPG combined).

Both come from the same maker or parent group. Costs assume 15,000 miles a year and the same fuel and electricity prices for both vehicles, using the EPA combined rating (55% city, 45% highway). Each figure is rounded to $10 and every difference is calculated from the rounded values.

Illustration: Standard pickups
  • Gas
  • Standard pickups

Chevrolet Silverado

Lowest fuel cost configuration

Silverado

20 MPG
Combined
18 MPG
City
21 MPG
Highway

Plug-in versions (electric or plug-in hybrid) are not used for this headline; see the powertrain table below.

Annual fuel cost
$3,340

$22.27 per 100 miles

15,000 mi/yr, same fuel prices

31 configurations in MY2026

Illustration: Standard pickups
  • Gas
  • Standard pickups

GMC Sierra

Lowest fuel cost configuration

Sierra

20 MPG
Combined
18 MPG
City
21 MPG
Highway

Plug-in versions (electric or plug-in hybrid) are not used for this headline; see the powertrain table below.

Annual fuel cost
$3,340

$22.27 per 100 miles

15,000 mi/yr, same fuel prices

25 configurations in MY2026

What the fuel costs

Annual fuel cost of the lowest-cost configuration

  • Chevrolet Silverado$3,340 a year · $22.27 per 100 mi
  • GMC Sierra$3,340 a year · $22.27 per 100 mi

Difference per year

Same

The rounded annual costs are equal

Head to head, MY2026

Chevrolet Silverado and GMC Sierra compared on their lowest fuel cost configuration
Measure Chevrolet Silverado GMC Sierra
Lowest-cost configuration SilveradoSierra
Powertrain GasGas
Combined rating 20 MPG20 MPG
City rating 18 MPG18 MPG
Highway rating 21 MPG21 MPG
Annual fuel cost $3,340/yr$3,340/yr
Cost per 100 miles $22.27$22.27
Annual cost range, all configurations $1,310–$5,360$1,360–$5,360
Configurations in MY2026 3125
EPA class Standard pickupsStandard pickups

Best configuration by powertrain

Lowest-cost configuration of each powertrain, Chevrolet Silverado and GMC Sierra
Powertrain Chevrolet Silverado GMC Sierra
Gas 20 MPG · $3,340/yr Silverado 20 MPG · $3,340/yr Sierra
Electric 70 MPGe · $1,310/yr Silverado EV Ext Range WT 68 MPGe · $1,360/yr SIERRA EV Ext Range (11kW Charger)
Diesel 25 MPG · $3,730/yr Silverado 25 MPG · $3,730/yr Sierra

Each cell shows the combined rating and the annual fuel cost of the lowest-cost configuration with that powertrain.

Where each one comes out ahead

Generated from the numbers above, comparing the lowest fuel cost configurations. No subjective judgements.

Chevrolet Silverado

  • Lower annual cost for the best electric configuration: $1,310 vs $1,360

GMC Sierra

Not ahead on any measure listed here.

Level on: annual fuel cost ($3,340), combined rating (20 MPG), city rating (18 MPG), highway rating (21 MPG), annual cost of the best diesel configuration ($3,730)

Year by year

Combined rating and annual fuel cost by model year, Chevrolet Silverado and GMC Sierra
Model year Chevrolet Silverado GMC Sierra
CombinedPer yearCombinedPer year
2026 15–25 MPG $1,310–$5,360 15–25 MPG $1,360–$5,360
2025 15–26 MPG $1,330–$5,360 15–26 MPG $1,440–$5,360
2024 15–26 MPG $1,390–$5,360 15–25 MPG $3,310–$5,360
2023 15–26 MPG $3,290–$5,300 15–26 MPG $3,290–$5,300
2022 14–26 MPG $3,240–$5,600 14–26 MPG $3,240–$5,600
2021 14–27 MPG $3,100–$5,020 14–26 MPG $3,100–$5,020
2020 15–27 MPG $3,100–$5,210 15–26 MPG $3,100–$4,750
2019 15–21 MPG $3,100–$4,670 15–21 MPG $3,100–$4,750
2018 17–20 MPG $3,290–$4,740 17–20 MPG $3,290–$4,740
2017 17–20 MPG $3,290–$3,920 17–20 MPG $3,290–$3,920
2016 17–20 MPG $3,290–$3,870 17–20 MPG $3,290–$3,840
2015 17–20 MPG $3,290–$3,870 17–20 MPG $3,290–$3,840
2014 17–20 MPG $3,300–$3,940 17–20 MPG $3,300–$3,940
2013 14–21 MPG $3,100–$4,610 14–21 MPG $3,100–$4,610
2012 14–21 MPG $3,100–$4,600 14–21 MPG $3,100–$4,610
2011 14–21 MPG $3,100–$4,610 14–21 MPG $3,100–$4,610
2010 14–22 MPG $2,970–$4,670 14–22 MPG $2,970–$4,670
2009 14–21 MPG $3,110–$4,670 14–21 MPG $3,110–$4,670
2008 14–17 MPG $3,840–$4,670 14–17 MPG $3,840–$5,740
2007 14–17 MPG $3,840–$5,740 14–17 MPG $3,840–$5,740
2006 14–17 MPG $3,840–$5,740 13–17 MPG $3,840–$6,180
2005 9–17 MPG $3,840–$5,940 9–17 MPG $3,840–$5,940
2004 10–17 MPG $3,840–$5,030 13–17 MPG $3,840–$5,030
2003 10–16 MPG $4,080–$5,030 13–16 MPG $4,080–$5,030
2002 11–16 MPG $4,080–$5,940 12–16 MPG $4,080–$5,440
2001 14–17 MPG $3,840–$4,670 11–17 MPG $3,840–$5,940
2000 12–17 MPG $3,840–$5,440 12–18 MPG $3,630–$5,440

Earlier model years are costed with today's fuel prices, so the table shows how each model's efficiency changed, not what fuel cost at the time. Ranges cover every configuration of that model year. Electric configurations are not included in the MPG range of a year that also has other powertrains.

Frequently asked questions

Which is cheaper to fuel, the Chevrolet Silverado or the GMC Sierra?

They cost the same: about $3,340 a year each. That compares the lowest-cost configuration of each in model year 2026 at 15,000 miles a year with the same fuel prices.

Which has the better fuel economy rating, the Chevrolet Silverado or the GMC Sierra?

Both are rated 20 MPG combined. City: 18 MPG vs 18 MPG. Highway: 21 MPG vs 21 MPG. These are the EPA ratings of each model's lowest-cost configuration.

How is the annual fuel cost calculated?

Distance of 15,000 miles a year at the EPA combined rating (55% city, 45% highway). Gasoline is priced at $4.36/gal (EIA U.S. average for regular, Sep 2026) and electricity at 18.3¢/kWh (EIA U.S. residential average, Jul 2026); premium and diesel configurations use their own EIA prices. Each result is rounded to $10, and differences are calculated from the rounded figures.

Are the Chevrolet Silverado and the GMC Sierra in the same class?

Yes. The EPA classes both as Standard pickups.

Explore these cars

More comparisons

EPA ratings: fueleconomy.gov file of Sep 29, 2026 · Prices: EIA regular gasoline, U.S. avg, Sep 2026 ($4.36/gal); residential electricity, U.S. avg, Jul 2026 (18.3¢/kWh) · 15,000 mi/yr, 55% city, same prices for both vehicles