Reality Check · Boston, MA
2026 GMC Sierra EV AT4 / Denali in Boston, MA
Winter range, charging cost and how far it goes, worked out for Boston's weather, grid and prices.
In a typical Boston January (30°F), a Sierra EV AT4 / Denali gets an estimated 341 miles on a charge, 17% less than its 410-mile rating, and about the same in the coldest week of the year (around January 19, when it averages 29°F). By June it's back to about 419. Power is pricey in Massachusetts (30.5¢/kWh), so charging at home costs about $184 a month for 38 miles a day, still less than the $298 a gas Sierra costs on Boston's gas. On the US average grid it makes 66% less CO₂ than gas.
Partly estimated. 2 of 5 temperature bands are from 117 real drives of this model; the rest come from 1,548 real drives in EVs at each temperature (and Recurrent's winter study below freezing), applied to its 410-mile rating. Each band switches to its own drives once it has 20 from 3 drivers.
October rangeEstimated
401mi
At Boston's typical October day, 55°F · 35% highway
Winter lowEstimated
339mi
January, 30°F · lows near 22°F
Home chargingEstimated
$184/mo
15.9¢ a mile at 30.5¢/kWh. Gas Sierra: $298/mo
Boston's grid
0.77lb CO₂/kWh
The US average (EPA eGRID): 66% less CO₂ than gas
Boston, season by seasonEstimated
A Sierra EV AT4 / Denali's range on a full charge, averaged over each season's months (30-year normal temperatures), at 35% highway.
Winter Dec–Feb · 32°F
15% below its 410-mile rating · coldest week 339 mi
350mi
Spring Mar–May · 48°F
5% below its rating
390mi
Summer Jun–Aug · 72°F
3% above its rating
424mi
Fall Sep–Nov · 55°FNow
About its rating
401mi
A Sierra EV AT4 / Denali's range through a Boston yearEstimated
Each month at Boston's 30-year normal temperature, 35% highway. 46 days a year average below freezing.
How far it goes from Boston, on real roadsEstimated
In October, from a full charge with 10% in reserve: about 180 mi out and back, 361 mi one way (January: 307 mi). Dots are DC fast chargers by network.
Fast charging around Boston
PlugLog's map of every public charger. Tesla-only Superchargers aren't counted.
- 194DC fast chargers within 25 mi
- 1.6 mito the nearest
- ChargePoint418 in reach
- Tesla Supercharger201
- EVgo168
- Electrify America96
- EV Connect78
Road trips in October, about, by road: Philadelphia (335 mi) and Syracuse (331 mi) one way on a charge; Harrisburg (420 mi) with one fast stop.
Questions Boston drivers ask
How far can a Sierra EV AT4 / Denali go in a Boston winter?
About 341 miles on a typical January day (30°F) and about the same in the coldest week of the year (around January 19, 29°F on average), estimated from real EV drives at those temperatures. That's 17% below its 410-mile rating, mostly from heating the cabin and the battery. Boston averages 46 days a year below freezing.
How much does it cost to charge a Sierra EV AT4 / Denali in Boston?
About $184 a month at home for 38 miles a day, at Massachusetts's average home electricity rate of 30.5¢/kWh: about 15.9¢ a mile. A gas Sierra on Boston's average gas ($4.25 a gallon) costs about $298 a month for the same driving.
Can I charge a Sierra EV AT4 / Denali on a regular 120 V outlet in Boston?
Not at 38 miles a day: a 120 V outlet adds only about 30 miles in 12 hours on an average day (26 in the coldest week). Plan on 240 V, which fills it from 10% in about 17 hours.
Is it greener to drive electric on Boston's grid?
Yes. The US average grid is about the US average, and a Sierra EV AT4 / Denali charged on it makes 66% less CO₂ than a gas Sierra.
Check it for your own address
Your street, your daily miles, any temperature on the knob.
Sierra EV AT4 / Denali Reality Check near Boston
Sources: temperatures, 30-year normals (NOAA 1991–2020) at Boston Logan International Airport, MA; home electricity, EIA (Massachusetts, July 2026); gas, EIA weekly (Boston); grid CO₂, EPA eGRID 2023; cold-weather range, PlugLog's real drives and Recurrent's winter study (Nov 2025); chargers, Open Charge Map and PlugLog. Updated Oct 22, 2026.