What is a GMT400?

GMT400 is the internal code name for the Chevrolet and GMC full-size pickup trucks produced from 1988 to 1998. These trucks were redesigned from the ground up with improved aerodynamics, suspension, braking, and steering systems. They were available with different engine sizes and transmissions, ranging from a 4.3-liter V6 to a 7.4-liter V8. The GMT400s are known for their durability and longevity, and are still popular among truck enthusiasts and collectors today.