Vortec, a new family of engines, is introduced, providing more power and torque than last year's offerings. The Vortec engines available on the Sierra 3500 pickups include a 5.7-liter V8, rated at 250 hp at 4,600 rpm and 355 lb-ft of torque at 2,800 rpm and a 7.4-liter V8, capable of 290 hp at 4,200 rpm and 410 lb-ft of torque at 3,200 rpm.Noteworthy comfort and convenience additions include illuminated entry, additional 12-volt power outlets, an electrochromic inside rearview mirror and height-adjustable front safety belts. Also the crew cab body styles get rear-seat heating ducts.Daytime Running Lamps (DRLs) are added this year as well.