The 2004 GMC Envoy is a traditional midsize SUV from General Motors' lineup. This trail-tough SUV is available in two main trims: SLE and SLT, both featuring a robust 4.2L inline-six engine with 275 horsepower, paired to a four-speed automatic transmission. Optional for the Envoy is a 5.3L V8 with a formidable 290 horsepower for drivers requiring a heavier duty option. Rear-wheel-drive is standard on all Envoys, with 4WD available as an option. Inside, the Envoy's spacious and quiet interior sets a comfortable stage for road trips, and the moving cargo shelf system adds a touch of versatility. Safety features include antilock disc brakes and dual front airbags, but some modern assists such as stability control or side curtain airbags were not available. The 2004 model year brought enhancements to the infotainment system and some detail updates to the exterior.