Every part number for your OBS truck — and where to buy it.

The 1988–1998 Chevy and GMC trucks — the “OBS” (Old Body Style) GMT400 platform — are one of the most-loved, most-restored truck generations ever built. But finding the right part for a 30-year-old truck still means scrolling forums, guessing at fitment, and clicking dead links.

OBS Garage fixes that. We cover the C/K 1500 & 2500 across all engines, and we're adding more parts and detail as the community grows. It's free — and always will be for the core lookup.