Category: C3500HD (GMT480)

The GMT400 GMC Sierra 3500 is the one‑ton backbone of GM’s OBS era—offered in single‑rear‑wheel (SRW) and dual‑rear‑wheel (DRW “Big Dooley”) configurations across Regular, Extended, and Crew Cab bodies. This guide separates what matters for buyers and researchers: SRW vs DRW hardware, 7.4L gas and 6.5L Turbo‑Diesel powertrains, 4L80‑E/NV4500 pairings, 4×4 transfer cases, full‑float 14‑bolt […]

The C/K 3500 sits at the top of the GMT400 lineup as the 1‑ton workhorse, offered in SRW (single‑rear‑wheel) and DRW “Big Dooley” forms with 8‑lug running gear, heavy‑duty brakes, and stout drivetrains. Across 1988–1998 (plus 1999 “Classic” run‑out), buyers could spec everything from small‑block gas to 7.4L big‑block and 6.5L Turbo Diesel, backed mostly […]