Three-piece hydroformed frame, LS-based V-8s, Autoride & Quadrasteer options.
The Chevrolet Silverado SS is the factory GMT800 performance version of the Silverado 1500. It took the regular half-ton Silverado formula and added the high-output 6.0L Vortec V8, SS-specific appearance content, sport-chassis tuning, 20-inch wheels, and drivetrain configurations that changed over the model run. On the GMT800 platform, the Silverado SS matters because it is […]
Quadrasteer is GM’s factory four-wheel-steering system for select GMT800 trucks and 2500-series full-size SUVs. Instead of only steering the front wheels, Quadrasteer uses a steerable rear axle, an electric rear steering actuator, a rear wheel steering control module, position sensors, a dash-mounted mode switch, and dedicated wiring to command limited rear-wheel steering. On the GMT800 […]
Quick idea: both share the same platform, wheelbase, suspension architecture, and full‑time 4WD system, but they package space very differently. The SUV gives you enclosed cargo + optional 3rd row; the SUT adds a pickup bed with a fold‑down midgate that opens the cabin to a ~6‑ft load floor. In 2008 both moved to the […]
Cadillac sold three GMT800 Escalades: the standard (short‑wheelbase) Escalade, the extended‑length ESV, and the EXT sport‑utility truck with the Avalanche‑style Midgate. All three use the 6.0L LQ9 V8 (345 hp/380 lb‑ft) and full‑time AWD with a single‑speed NP149 transfer case (RPO NP3), but they differ meaningfully in size, cargo, and tow ratings. GMT800 Escalade vs […]
The Suburban and Yukon XL are the same bones on GMT800; your choice comes down to trim packaging, branding, and the Denali variant. Half‑tons (1500) are the people‑movers; three‑quarter‑tons (2500) are the tow mules with bigger brakes, 8‑lug running gear, and available 8.1L big‑block. GMC’s Yukon XL Denali is a 1500‑only, AWD luxury spec with […]
If you’re cross‑shopping a GMT800 Chevrolet Tahoe (’00–’06) and GMC Yukon (’00–’06), the big secret is this: they’re mechanically twins. The meaningful differences are branding, packaging, trims, and the Yukon Denali sub‑model with its 6.0L V8 and full‑time AWD. This guide compares them model‑by‑model and year‑by‑year, then translates axle codes and tow ratings so you […]
What makes the SUT different from the H2 SUV? The GMT800 Hummer H2 SUT swaps the enclosed cargo area for a short pickup box and fold‑flat Midgate: drop the power rear window and fold the Midgate and rear seat forward to create a 4‑by‑6‑foot open bed (approx. 72.2 in long; 47.3 in between wheelhouses). Many […]
The GMT800 Hummer H2 is one of the few GMT‑family SUVs with a dedicated, heavy-duty full‑time 4WD system, a driver‑selectable rear locker, and a frame that mixes 2500‑series and SUV components. If you’re shopping, modding, or documenting one, the details below save hours of scattered research. At‑a‑Glance GMT800 HUMMER H2 SUV Trims, Packages & Special […]
The GMT800 Cadillac Escalade EXT is Cadillac’s luxury sport-utility truck interpretation of the Avalanche formula: full-size SUV cabin comfort up front, a Midgate and convertible composite pickup bed out back, plus the premium Cadillac layer on top of GM’s hydroformed-frame, LS-based truck architecture. In enthusiast shorthand it is part of the GMT800 family, and that […]
The first-generation GMT800 platform family (1999–2006 for pickups; 2000–2006 for most full-size SUVs) is the era that brought GM’s full-size trucks into the hydroformed-frame, LS-based Vortec world. “GMT800” is enthusiast shorthand for the shared chassis and drivetrain DNA across Chevrolet, GMC, and Cadillac — and it’s the reason a lot of parts, service logic, and […]
