Power-adjustable pedals, satellite radio, and a navigation system are newly available for 2004 on Chevrolet's midsize SUV. TrailBlazer is the top-selling version of a basic GM platform that also hosts the Buick Rainier, GMC Envoy, Oldsmobile Bravada, and Isuzu Ascender. TrailBlazer, Envoy, and Ascender come in regular-length 5-passenger form or extended-length 7-seat configuration. Bravada and Rainier are 5-seaters only. The Envoy XUV is an extended-length 5-seater with a unique sliding cargo roof.

TrailBlazers come in LS and LT trim. Extendeds are called EXTs. Standard on all is a 4-speed automatic transmission and inline 6-cyl engine. Optional on EXTs is a V8. TrailBlazers offer rear-wheel drive with available traction control or GM's Autotrac 4WD that can be left engaged on dry pavement and includes low-range gearing. Antilock 4-wheel disc brakes are standard. Front side airbags are optional; the driver's bag covers head and torso. Curtain side airbags are unavailable. Seventeen-inch wheels vs. 16s are standard on the LT EXT and optional on the regular-length LT. Options include rear DVD entertainment, OnStar assistance, and a sunroof. The newly available navigation system is part of a combination radio/navigation unit that puts the navigation screen in the audio faceplate.