GMC Sierra EV: energy use, battery size and what it costs to charge

EPA figures for 2025, 2026 GMC Sierra EV (4 configurations), plus the cost to charge at home in every U.S. state at May 2026 electricity prices.

The GMC Sierra EV uses 49.57 kWh per 100 miles. Across the 223 electric cars on sale that figure runs from 23.1 to 66.1, which puts this one among the thirstier.

How much does it cost to charge a GMC Sierra EV?

At the U.S. average residential price of 19.42¢ per kWh, a GMC Sierra EV costs about $9.63 per 100 miles, $35.52 for a full charge, and $1,155 a year at 12,000 miles. The same car costs $780 a year in Nevada and $3,136 in Hawaii — a 4.0× difference driven entirely by where you plug in.

GMC Sierra EV vs. a petrol car

A typical new gasoline full-size pickup returns 18 MPG. At $4.32 a gallon — the U.S. average for the week of 2026-09-14, up 14.3% on the year — that is $23.99 per 100 miles against $9.63 for the GMC Sierra EV on average-priced electricity. Over 12,000 miles the fuel difference is $1,724 a year in favour of the electric car.

Cost to charge a GMC Sierra EV in every state

Every GMC Sierra EV configuration compared

Questions people ask about the GMC Sierra EV

How many kWh per 100 miles does a GMC Sierra EV use?

The GMC Sierra EV uses 49.57 kWh per 100 miles on the EPA combined cycle, which works out to 2.02 miles per kWh. Across all 4 EPA-rated configurations it ranges from 49.57 to 52.66 kWh per 100 miles.

How big is the GMC Sierra EV battery?

Its usable battery capacity works out to roughly 182.9 kWh. EPA does not publish battery size directly, so this is calculated from EPA range (410 miles) and rated energy use, corrected for charging losses — expect a few kWh of error against the manufacturer figure.

How much does it cost to charge a GMC Sierra EV at home?

About $35.52 for a full charge at the U.S. average residential electricity price of 19.42¢ per kWh, or $9.63 per 100 miles. Over a year at 12,000 miles that is $1,155. In Nevada the same driving costs $780; in Hawaii it costs $3,136.

How long does a GMC Sierra EV take to charge on a 240V charger?

EPA rates it at about 18.6 hours for a full charge on a 240-volt (Level 2) charger. A standard 120-volt household outlet takes roughly five to six times longer; DC fast charging is far quicker but costs considerably more per kWh than charging at home.

Is a GMC Sierra EV cheaper to run than a gasoline car?

On fuel alone, yes. A GMC Sierra EV costs about $9.63 per 100 miles in electricity. A typical new gasoline full-size pickup manages 18 MPG, which at $4.32 a gallon costs $23.99 per 100 miles — $14.37 more. Over 12,000 miles the difference is $1,724 a year in the EV's favour. This compares fuel only — not insurance, depreciation, maintenance or your state's EV registration fee.

Cars to compare it with

Almost identical energy use

These use within a fraction of a kWh per 100 miles of the GMC Sierra EV, so running cost is effectively a wash between them — the decision comes down to everything else.

Other electric full-size pickups

• Chevrolet Silverado EV 8WT — 49.57 kWh/100mi
• Ford F-150 Lightning SR — 49.57 kWh/100mi
• Chevrolet Silverado EV — 48.15 kWh/100mi
• Ford F-150 Lightning PRO — 48.15 kWh/100mi
• Ford F-150 Lightning Platinum — 51.07 kWh/100mi
• Rivian R1T AT — 51.85 kWh/100mi
• Ford F-150 Lightning — 46.81 kWh/100mi
• Rivian R1T Quad — 44.35 kWh/100mi
• Rivian R1T All-Terrain — 43.21 kWh/100mi
• Tesla Cybertruck — 41.1 kWh/100mi

Other GMC electric cars

• Hummer EV Pickup — 63.59 kWh/100mi
• Hummer EV Pickup 2M20 — 64.82 kWh/100mi
• Hummer EV Pickup 2X — 63.59 kWh/100mi
• Hummer EV Pickup 3X — 64.82 kWh/100mi
• Hummer EV SUV — 63.59 kWh/100mi
• Hummer EV SUV 2M20 — 66.09 kWh/100mi
• Hummer EV SUV 2X — 63.59 kWh/100mi
• Hummer EV SUV 3X — 64.82 kWh/100mi

Where these numbers come from

Energy use per 100 miles is 3,370.5 ÷ MPGe, because EPA defines MPGe against 33.705 kWh per gasoline gallon equivalent. EPA meters that energy at the wall, so charging losses are already included.

Usable battery size is EPA range × kWh per 100 miles ÷ 100 × 0.90. The 0.90 corrects for the fact that EPA measures energy at the wall but measures range from the pack; without it the estimate runs about 10% high. It is an estimate, not a manufacturer specification — expect a few kWh of error either way.

Cost assumes home charging at the state's average residential electricity price (EIA, May 2026) and 12,000 miles a year. Public DC fast charging costs considerably more; time-of-use plans can cost less.

The petrol comparison uses the median combined MPG of current regular-gasoline, non-hybrid cars in this car's own EPA vehicle class — not an all-car average — priced at the U.S. average retail price from the EIA weekly series. It counts fuel only.