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The rear suspension shapes how a truck feels as much as the front does. Classic GM trucks left the factory on leaf springs, and for hauling a load on a work site they did the

Tall, heavy and soft is a recipe for body roll, and classic GM trucks have all three. Take an off-ramp a little quickly and the whole truck leans, the tires scrub and you find yourself

Anyone who has driven a K5 Blazer, a Jimmy, a Suburban or an old K10 at highway speed knows the feeling. The wheel never quite settles, every expansion joint arrives twice, and a long drive

What a K5 Blazer LS or LT swap really involves on a stock frame, and how a chassis built for a modern GM drivetrain simplifies it.

The common suspension upgrades for 1973–1991 Chevy and GMC 4x4s, what each one really fixes, and when a new chassis is the smarter move.

What a K5 Blazer, K10 or Suburban chassis swap costs, from a $17,900 bare galvanized frame to a complete chassis, and what drives the total.

Why hot-dip galvanizing protects a classic K5 Blazer or squarebody frame from rust far better than paint or powder coat.

How a solid front axle and independent front suspension compare on a K5 Blazer, and which one suits the way your truck will be driven.

What a squarebody frame swap involves for 1967–1991 Chevy and GMC 4x4s, the three ways to do it, and how a bolt-on IFS chassis simplifies the job.

A custom chassis should be the foundation of the whole build—not another part that forces the rest of the truck into compromises. Before ordering a chassis for a classic Chevy 4×4, decide how the finished