The GMC Sierra EV actually went 422 miles in the MotorTrend Road Trip Range Test, that's correct, four hundred and twenty two. That’s a bit more than the 440 miles GMC says it can do, but we kept it cruising at 70 mph, using up 95 percent of the battery. GMC’s range claim might be doable, but we just stop at 5 percent to make sure there’s enough juice to get to a charger. Oh, and GMC’s already announced a 20-mile range boost for 2025. Definitely a nice little upgrade