The OBS Is the Next Squarebody: Why 1988-98 GM Trucks Are the Smartest Build of the Decade

Ten years ago you could buy a clean Squarebody for the price of a used Civic, and the smart money said grab one before everyone notices. Everyone noticed. Today a straight 1973-87 short bed brings real money, and the guys who waited are paying triple for trucks they passed on.

The exact same movie is playing again. Different truck, same plot. The 1988-98 Chevy and GMC trucks, the ones everybody calls OBS, are at the steep part of the curve right now, and this time there is no excuse for missing it.

How the OBS happened

By the mid 1980s GM's truck styling was old news. The Squarebody had run since 1973, an eternity even by truck standards, a story we told in the Squarebody history. Its replacement, the GMT400 platform, landed in 1988 as the most modern full-size truck America had ever built: wind-tunnel-shaped sheet metal, flush glass and door handles, independent front suspension on every configuration, and a cab that finally treated the driver like a human being.

The nickname came later, and backwards. When GM launched the rounded 1999 Silverado, dealers and parts counters needed a way to refer to the outgoing truck. Old Body Style. OBS. The name stuck so hard that an entire scene now wears it as a badge.

The engine story ran from the 4.3 V6 through the 5.0 and 5.7 small blocks up to the 454, with the 6.5 turbo diesel alongside. The 1994 facelift cleaned up the grille and interior, and 1996 brought Vortec power that made these trucks legitimately quick for their era. Extended cabs, crew cabs, Tahoes, Suburbans, and the two-door Tahoe rounded out a family that GM built by the millions.

The market signals, if you know where to look

Every collector truck follows the same arc: work tool, cheap used truck, enthusiast discovery, price explosion. The OBS checked the third box years ago. The signals for the fourth are everywhere. Single cab short beds, the configuration the scene wants most, have pulled away from the pack in price. Clean unmodified survivors are getting harder to find because the good ones are already in builders' hands. Dedicated OBS shows sell out. Aftermarket support, the truest sign of a platform's arrival, has gone from nothing to an industry, with companies like Dakota Digital building RTX gauge systems specifically for these trucks.

And the generation driving the money matters. The people entering their peak earning years right now grew up in the back seat of an OBS Suburban or watching one tow the family boat. Nostalgia is a market force with a 25 year fuse, and it just burned down.

Why the OBS is a better build platform than the trucks before it

Here is the part the classic truck crowd sometimes misses: the OBS is simply easier to live with. It has modern-enough brakes, steering, and climate control to daily drive without heroics. The aero body means highway manners no Squarebody can match. LS swaps drop in with well-documented paths. And the flush glass and clean lines mean the truck already speaks the pro-touring design language; you are enhancing the design rather than fighting it.

The weak point on every OBS is the same: the interior. GM built these cabins from plastics that were marginal in 1995 and are crumbling now. Cracked door panels, sagging headliners, sun-destroyed dash tops, and carpet that gave up during the Clinton administration. That is exactly the gap Fesler builds for.

Building the cab back better than GM did

We make hand-laid fiberglass door panels for crew cab trucks and Suburbans and two-door trucks and Tahoes, panels that solve the crumbling plastic problem permanently and give upholsterers a real foundation, a difference we explained in fiberglass vs ABS panels. Add kick panels, the smooth cowl panel, and molded carpet kits, and the whole cabin comes back at a level GM never offered.

We put our money on this platform in the most public way possible: our own OBS shop truck took People's Choice at Concourse in the Hills against a field of six-figure builds. The truck works. The market knows it.

OBS FAQ

What years count as OBS?

1988-98 for Chevy and GMC pickups, with the Tahoe and Suburban running the body through 1999 and some configurations into 2000. All of it sits on the GMT400 platform.

Which OBS is the one to buy?

Condition first, configuration second. The scene premium sits on single cab short beds, but extended cabs and two-door Tahoes are climbing fast and still undervalued. Buy the straightest, driest truck you can find; sheet metal work erases any purchase savings instantly.

Are OBS trucks actually collectible or just trendy?

The Squarebody answered this question already. Production numbers do not matter when demand is generational; millions of Squarebodies existed too, and clean ones still got expensive. The OBS has the same fundamentals with a younger audience.

What should I fix first on an OBS?

Whatever keeps it from driving safely, then the interior. The cabin is where these trucks show their age worst and where the transformation per dollar is highest. Our OBS restoration overview maps the full journey.

The window where an OBS costs less than the sum of its potential is closing the way it closed on the Squarebody. If you have one in the driveway, build it. If you do not, find one this year, then come see us about the interior.