Reality Check · Tucson, AZ
2026 GMC Sierra EV AT4 / Denali in Tucson, AZ
Winter range, charging cost and how far it goes, worked out for Tucson's weather, grid and prices.
Winter barely touches range in Tucson: at a typical January's 54°F, a Sierra EV AT4 / Denali gets an estimated 399 miles on a charge, about its 410-mile rating. Summer is the harder season here: at July's 88°F average (highs near 100°F), air conditioning trims it to about 409 miles. Charging at home at Arizona's average rate (15.4¢/kWh) costs about $88 a month for 38 miles a day, about a third of the $351 a gas Sierra costs on the West Coast's gas. On Tucson's grid (WECC Southwest), about the US average, it makes 71% 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 range
425mi
At Tucson's typical October day, 73°F · 35% highway
Winter lowEstimated
397mi
January, 54°F · lows near 40°F
Home chargingEstimated
$88/mo
7.6¢ a mile at 15.4¢/kWh. Gas Sierra: $351/mo
Tucson's grid
0.70lb CO₂/kWh
WECC Southwest (EPA eGRID): about the US average, 71% less CO₂ than gas
Tucson, 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 · 54°F
About its rating · coldest week 397 mi
400mi
Spring Mar–May · 69°F
About its rating
420mi
Summer Jun–Aug · 87°F
About its rating
411mi
Fall Sep–Nov · 72°FNow
About its rating
418mi
A Sierra EV AT4 / Denali's range through a Tucson yearEstimated
Each month at Tucson's 30-year normal temperature, 35% highway. No day of the year averages below freezing.
How far it goes from Tucson, on real roads
In October, from a full charge with 10% in reserve: about 191 mi out and back, 383 mi one way (January: 359 mi). Dots are DC fast chargers by network.
Fast charging around Tucson
PlugLog's map of every public charger. Tesla-only Superchargers aren't counted.
- 29DC fast chargers within 25 mi
- 3.4 mito the nearest
- Tesla Supercharger52 in reach
- EVgo41
- ChargePoint40
- Electrify America34
- Blink18
Road trips in October, about, by road: El Paso (326 mi) and Phoenix (151 mi) one way on a charge; Albuquerque (396 mi) with one fast stop.
Questions Tucson drivers ask
How far can a Sierra EV AT4 / Denali go in a Tucson winter?
Tucson's winters are mild: about 399 miles on a typical January day (54°F) and about the same in the coldest week (around December 20, 52°F), estimated from real EV drives at those temperatures. That's about its 410-mile rating. The harder season here is summer: about 409 miles in July, with the air conditioning on.
How much does it cost to charge a Sierra EV AT4 / Denali in Tucson?
About $88 a month at home for 38 miles a day, at Arizona's average home electricity rate of 15.4¢/kWh: about 7.6¢ a mile. A gas Sierra on the West Coast's average gas ($5.01 a gallon) costs about $351 a month for the same driving.
Can I charge a Sierra EV AT4 / Denali on a regular 120 V outlet in Tucson?
Not at 38 miles a day: a 120 V outlet adds only about 32 miles in 12 hours on an average day (30 in the coldest week). Plan on 240 V, which fills it from 10% in about 17 hours.
Is it greener to drive electric on Tucson's grid?
Yes. Tucson's grid (WECC Southwest) is about the US average, and a Sierra EV AT4 / Denali charged on it makes 71% 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 Tucson
Sources: temperatures, 30-year normals (NOAA 1991–2020) at Tucson International Airport, AZ; home electricity, EIA (Arizona, July 2026); gas, EIA weekly (the West Coast); 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.