...off-roading isn't just about rock crawling. What about those situations where the road is full of holes and you end up getting one or two wheels off the ground? No, the Trailblazer isn't good at those, either. There's two ways to handle those situations: articulation and differential locks, and the Trailblazer doesn't have either. The wheels don't have a lot of travel, so they can't drop down into holes to maintain contact with the ground. Chevrolet's ability to package a torsion beam, a rear differential, and a Watt's link under the rear of the car is impressive, but torsion beams are pretty useless off-road.
One wheel in a hole is no problem, as the other three have plenty of grip. Two wheels? Especially at opposite corners of the vehicle? Bad news. The Trailblazer has open differentials front and rear, so any time a wheel loses traction it spins like crazy while the wheel on the other side of the axle goes nowhere. If just one of the four wheels is doing that, the other axle can pull the vehicle out. If a wheel on each axle is in the air or just plain loses traction, you're in trouble. Some vehicles solve this problem by using the brakes to stop the loose wheels from spinning and force the wheels with traction to turn. The Trailblazer kind of does that, but half-heartedly at best. When we got in these situations, fluctuating the gas and letting the vehicle rock a bit eventually got it free with a bit of help from the brakes, but more from plain old momentum.