Reality Check · Houston, TX
2026 GMC Sierra EV AT4 / Denali in Houston, TX
Winter range, charging cost and how far it goes, worked out for Houston's weather, grid and prices.
Winter barely touches range in Houston: at a typical January's 55°F, a Sierra EV AT4 / Denali gets an estimated 401 miles on a charge, about its 410-mile rating. Charging at home at Texas's average rate (15.9¢/kWh) costs about $90 a month for 38 miles a day, against $260 for a gas Sierra on Houston's gas. On Houston's grid (ERCOT All), about the US average, it makes 70% 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
426mi
At Houston's typical October day, 73°F · 35% highway
Winter lowEstimated
400mi
January, 55°F · lows near 46°F
Home chargingEstimated
$90/mo
7.8¢ a mile at 15.9¢/kWh. Gas Sierra: $260/mo
Houston's grid
0.73lb CO₂/kWh
ERCOT All (EPA eGRID): about the US average, 70% less CO₂ than gas
Houston, 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 · 57°F
About its rating · coldest week 400 mi
404mi
Spring Mar–May · 71°F
3% above its rating
422mi
Summer Jun–Aug · 84°F
About its rating
417mi
Fall Sep–Nov · 72°FNow
About its rating
420mi
A Sierra EV AT4 / Denali's range through a Houston yearEstimated
Each month at Houston's 30-year normal temperature, 35% highway. No day of the year averages below freezing.
How far it goes from Houston, on real roads
In October, from a full charge with 10% in reserve: about 192 mi out and back, 383 mi one way (January: 361 mi). Dots are DC fast chargers by network.
Fast charging around Houston
PlugLog's map of every public charger. Tesla-only Superchargers aren't counted.
- 171DC fast chargers within 25 mi
- 1.0 mito the nearest
- EVgo176 in reach
- Tesla Supercharger174
- ChargePoint132
- EV Connect71
- Shell Recharge48
Road trips in October, about, by road: McAllen (377 mi) and Baton Rouge (323 mi) one way on a charge; New Orleans (409 mi) with one fast stop.
Questions Houston drivers ask
How far can a Sierra EV AT4 / Denali go in a Houston winter?
Houston's winters are mild: about 401 miles on a typical January day (55°F) and about the same in the coldest week (around January 6, 55°F), estimated from real EV drives at those temperatures. That's about its 410-mile rating.
How much does it cost to charge a Sierra EV AT4 / Denali in Houston?
About $90 a month at home for 38 miles a day, at Texas's average home electricity rate of 15.9¢/kWh: about 7.8¢ a mile. A gas Sierra on Houston's average gas ($3.71 a gallon) costs about $260 a month for the same driving.
Can I charge a Sierra EV AT4 / Denali on a regular 120 V outlet in Houston?
Not at 38 miles a day: a 120 V outlet adds only about 32 miles in 12 hours on an average day (31 in the coldest week). Plan on 240 V, which fills it from 10% in about 17 hours.
Is it greener to drive electric on Houston's grid?
Yes. Houston's grid (ERCOT All) is about the US average, and a Sierra EV AT4 / Denali charged on it makes 70% 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 Houston
Sources: temperatures, 30-year normals (NOAA 1991–2020) at Houston Hobby Airport, TX; home electricity, EIA (Texas, July 2026); gas, EIA weekly (Houston); 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.