Reality Check · Chattanooga, TN
2026 GMC Sierra EV AT4 / Denali in Chattanooga, TN
Winter range, charging cost and how far it goes, worked out for Chattanooga's weather, grid and prices.
Chattanooga's winters are cool rather than cold: on a typical January day (42°F) a Sierra EV AT4 / Denali gets an estimated 383 miles, 7% under its 410-mile rating, about the same as in the coldest week (around January 11, when it averages 41°F). By May it's back to about 422. Charging at home at Tennessee's average rate (13.7¢/kWh) costs about $79 a month for 38 miles a day, about a third of the $291 a gas Sierra costs on the Midwest's gas. Chattanooga's grid (SERC Tennessee Valley) is 17% dirtier than the US average, but charging on it still makes 62% 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
412mi
At Chattanooga's typical October day, 63°F · 35% highway
Winter lowEstimated
383mi
January, 42°F · lows near 32°F
Home chargingEstimated
$79/mo
6.8¢ a mile at 13.7¢/kWh. Gas Sierra: $291/mo
Chattanooga's grid
0.90lb CO₂/kWh
SERC Tennessee Valley (EPA eGRID): 17% dirtier than the US, 62% less CO₂ than gas
Chattanooga, 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 · 44°F
6% below its 410-mile rating · coldest week 383 mi
386mi
Spring Mar–May · 62°F
About its rating
410mi
Summer Jun–Aug · 79°F
4% above its rating
427mi
Fall Sep–Nov · 63°FNow
About its rating
412mi
A Sierra EV AT4 / Denali's range through a Chattanooga yearEstimated
Each month at Chattanooga's 30-year normal temperature, 35% highway. No day of the year averages below freezing.
How far it goes from Chattanooga, on real roadsEstimated
In October, from a full charge with 10% in reserve: about 185 mi out and back, 370 mi one way (January: 345 mi). Dots are DC fast chargers by network.
Fast charging around Chattanooga
PlugLog's map of every public charger. Tesla-only Superchargers aren't counted.
- 34DC fast chargers within 25 mi
- 1.3 mito the nearest
- ChargePoint399 in reach
- Tesla Supercharger205
- EVgo160
- EV Connect118
- Electrify America70
Road trips in October, about, by road: Winston-Salem (362 mi) and Cincinnati (356 mi) one way on a charge.
Questions Chattanooga drivers ask
How far can a Sierra EV AT4 / Denali go in a Chattanooga winter?
About 383 miles on a typical January day (42°F) and about the same in the coldest week of the year (around January 11, 41°F on average), estimated from real EV drives at those temperatures. That's 7% below its 410-mile rating, mostly from heating the cabin and the battery.
How much does it cost to charge a Sierra EV AT4 / Denali in Chattanooga?
About $79 a month at home for 38 miles a day, at Tennessee's average home electricity rate of 13.7¢/kWh: about 6.8¢ a mile. A gas Sierra on the Midwest's average gas ($4.14 a gallon) costs about $291 a month for the same driving.
Can I charge a Sierra EV AT4 / Denali on a regular 120 V outlet in Chattanooga?
Not at 38 miles a day: a 120 V outlet adds only about 31 miles in 12 hours on an average day (29 in the coldest week). Plan on 240 V, which fills it from 10% in about 17 hours.
Is it greener to drive electric on Chattanooga's grid?
Yes. Chattanooga's grid (SERC Tennessee Valley) is 17% dirtier than the US average, but a Sierra EV AT4 / Denali charged on it still makes 62% 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 Chattanooga
Sources: temperatures, 30-year normals (NOAA 1991–2020) at Chattanooga Lovell Airport, TN; home electricity, EIA (Tennessee, July 2026); gas, EIA weekly (the Midwest); 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.