Here’s a detailed comparison of the 2026 GMC Sierra EV AT4 vs MUD (Max Ultra Durable) versions, exploring whether the AT4 is the standout choice:
Both AT4 and MUD share top-tier off-road capabilities:
The AT4 Max Range (MUD) is likely the best all-around Sierra EV, combining rugged off-road capability with best-in-class range and charging. It confidently earns the title of GMC’s top-tier EV truck — if you’re ready to pay the premium.
Let me know if you'd like a breakdown of towing specs, comparisons with Rivian R1T or Hummer EV, or details on regional availability/pricing near you!
Trim & Battery Configurations
- AT4 Trim
- Directly designed for off-road adventure
- Comes with Extended Range (≈170 kWh) and Max Range (≈205 kWh) battery options
- Extended Range starts around $81,395, while Max Range is about $91,695 (includes destination fees)
- MUD (Max Ultra Durable)
- Not an official GMC name. Likely refers to the Max Range variant equipped with added off-road features (CrabWalk, 35″ tires, raised suspension, etc.)
Off-Road Performance & Rugged Specs
Both AT4 and MUD share top-tier off-road capabilities:
- AT4 offers +2″ ground clearance, 35″ all-terrain tires, terrain-specific drive modes, plus 4‑wheel steering with CrabWalk — also included with AT4’s Max Range pack
- With the Max Range battery, range is still strong (~440–460 mi EPA), and onboard 10.2 kW V2L (Energy Transfer Pro) becomes available
Range & Charging
| Trim | Battery | EPA Range Estimate | DC Fast-Charge |
|---|---|---|---|
| AT4 Extended Range | ≈170 kWh | ~390 mi | up to 300 kW |
| AT4 Max Range (MUD?) | ≈205 kWh | ~460 mi | up to 350 kW |
- Extended Range offers ~390 mi and fast-charging support
- Max Range boosts range to ~460 mi with up to 350 kW charging, plus V2L
Features & Luxury
- AT4 adds Forest Storm interior, a red GMC badge, and standard Super Cruise hands-free highway driving
- Cabin is shared with Denali: plush, high-tech, Super Cruise capable, adaptive air ride suspension, 4-wheel steering, CrabWalk
- Owners praise its premium build but note GM dropped CarPlay/Android Auto in favor of Google-based infotainment
Drawbacks
- Large size & heavy weight lead to reduced efficiency (real-world ~2 mi/kWh) and firm ride, especially on sport or lifted setups
- Lack of CarPlay remains controversial, despite Google Map and Spotify support
So, is AT4/MUD the best version?
- If you want the ultimate off-road-capable EV truck
→ Go for the AT4 with Max Range (i.e., “MUD”) — it delivers ground clearance, CrabWalk, brutal range (≈460 mi), fast charging (350 kW), V2L, and rugged aesthetics. - If you don’t need maximum range, the AT4 Extended gives most of the same off-road adaptation at a ~10 k cheaper price.
- Comparing to other trims:
- Denali offers more luxury but lacks some off-road gear
- Elevation is budget-friendly but not off-road specialized
Bottom Line
The AT4 Max Range (MUD) is likely the best all-around Sierra EV, combining rugged off-road capability with best-in-class range and charging. It confidently earns the title of GMC’s top-tier EV truck — if you’re ready to pay the premium.Let me know if you'd like a breakdown of towing specs, comparisons with Rivian R1T or Hummer EV, or details on regional availability/pricing near you!