The AT4X is a great truck. It’s also $72,000 before you add anything to it, and a big chunk of that premium is factory suspension and tires that most people could replicate aftermarket for a fraction of the cost. This guide is for Elevation, SLE, and SLT owners — the people who bought the truck that made sense financially and now want to build it toward the same capability without paying the AT4X dealer markup. Everything here applies to the 2024 and 2025 Sierra 1500. Where year-specific d