If you are in the market for a top-tier, luxury General Motors truck, you have likely narrowed your search down to two heavy hitters: the off-road-ready GMC Sierra 1500 AT4X and the pinnacle of on-road luxury, the Denali Ultimate.

At first glance, both carry sticker prices pushing $90,000 and offer incredibly plush interiors. You might find yourself asking, "What exactly is an AT4X, and why should I care when the Denali name is so established?"

Final Verdict

If you are towing anything north of 7,000 lbs, I highly recommend moving up to a heavy-duty diesel platform. And if you do, add air suspension.

Whether you choose Logic IQ (which offers incredible tech) or Airlift (which offers a slightly longer warranty), having the ability to level your load makes for a safer, smoother, and more enjoyable towing experience.