both brands. Four-door Yukon and Tahoe production started on January 20, 1995, at Janesville Assembly. The Tahoe was Motor Trend magazine's Truck of the Year for 1996. The Tahoe and Yukon are considerably shorter than the Suburban on which they are based, but share that vehicle's GMT400 platform. It is built on a true truck chassis, derived from the one in the Chevrolet Silverado full-size pickup truck. Both two-door and four-door models were produced in rear- and four-wheel drive versions. Four-door models had a longer wheelbase, and greater length than the two-door models. Two-door models weigh roughly while four-door models weigh about . "AutoTrac" full-time all-wheel drive and a programmable Homelink garage door transmitter were added for 1998. The upscale Denali trim line to the Yukon was introduced in 1999. The standard engine was Chevrolet's LO5 small-block V8, while a turbocharged Detroit Diesel V8 was available beginning in 1994. In Mexico, the two-door Tahoe was released in 1995, called the Chevrolet Silverado, and in 1998, the four-door model was released as the Silverado 4-door. Both models were available with the Base, LS, or luxury LT trim packages. In Venezuela, the two-door Tahoe was released in 1993 (4WD only), called the Chevrolet Grand Blazer, and in 1996, the four-door model was released as the Grand Blazer 4-door (2WD). In 1996 the 2-door was discontinued. In 1996, only the Grand Blazer 4-door 4WD was available. In Bolivia, the four-door model was released in 1995 as the Tahoe 4-door (4WD). Beginning in 1994, GM began making numerous annual changes to the Blazer/Yukon, including: Revised front clip – Blazer (1994) Revised interior including a driver-side air bag, revised side mirrors, Blazer renamed Tahoe, four-door option included (1995) Revised Vortec 5700 (350 cu in) engine with increased power and fuel efficiency, electronic 4WD shifting, daytime running lights, illuminated entry, and new interior features (1996) Revised front clip – Mexican-market Silverado (1996) Revised automatic transmission, new EVO (electronic variable orifice) speed-sensitive power steering system and added passenger-side airbag, last year of the two-door Yukon (1997) Programmable Homelink garage door transmitter, PassLock security system, heated front seats optional, air conditioning for rear seat passengers, AutoTrac automatic 4WD option added, second-generation airbags, transmissions revised again (1998) Last year of the two-door Tahoe (1999) Tahoe Limited and Tahoe Z71 When the GMT800-based Chevrolet Tahoe/GMC Yukon was released for the 2000 model year, a 2WD Tahoe Limited and 4WD Tahoe