Chevrolet Silverado (first generation)

First generation
2003–2005 Silverado 1500 Extended Cab w/Z71
Overview
Production	June 1998[1] – 2007
Model years	1999–2006 (1500) 1999–2004 (2500) 2001–2006 (HD) 2007 (Classic; all models)
Assembly	United States: Roanoke, Indiana (Fort Wayne Assembly); Flint, Michigan (Flint Truck Assembly); Pontiac, Michigan (Pontiac East Assembly) Canada: Oshawa, Ontario (Oshawa Truck Assembly) Mexico: Silao, Guanajuato (Silao Assembly)
Designer	Wayne Cherry (1994, 1995) Ken Sohocki (1994, 1995)[2]
Body and chassis
Platform	GM GMT800 platform
Powertrain
Engine	4.3 L Vortec 4300 V6 4.8 L Vortec 4800 V8 5.3 L Vortec 5300 V8 6.0 L Vortec 6000 V8
Transmission	4-speed 4L60-E automatic 4-speed 4L65-E automatic 4-speed 4L80-E automatic 5-speed NV3500 manual 5-speed NV4500 manual
Hybrid drivetrain	MHEV (Silverado Hybrid)
Dimensions
Wheelbase	119 in (3,023 mm) 133 in (3,378 mm) 143.5 in (3,645 mm)
Length	Standard Cab, Short Box: 203.3 in (5,164 mm) Standard Cab, Long Box: 222.2 in (5,644 mm) Extended Cab, Short Box: 227.8 in (5,786 mm) Extended Cab, Long Box: 246.7 in (6,266 mm) Crew Cab, Short Box: 232.2 in (5,898 mm) Hybrid: 230.2 in (5,847 mm)
Width	78.5 in (1,994 mm)
Height	74 in (1,880 mm) 77 in (1,956 mm) Hybrid 2WD: 71.2 in (1,808 mm) Hybrid 4WD: 73.9 in (1,877 mm)
Chronology
Predecessor	Chevrolet C/K (fourth generation)
Successor	Chevrolet Silverado (second generation)

The first generation of the Chevrolet Silverado is a series of trucks manufactured by General Motors from 1998 until 2007 under the Chevrolet brand and also as the GMC Sierra. Built on the new GMT800 platform, the Silverado/Sierra 1500 and 2500 pickup trucks were first released in August 1998 as 1999 models. The "classic" light-duty GMT400 C/K trucks were kept in production alongside the new types for the first model year, while the heavy-duty GMT400 pickups (as well as the GMT400 SUVs) were continued until 2000, with the new GMT800 Silverado/Sierra HD (Heavy Duty) released in model year 2001. A 3500 model was added later for 2001, with the introduction of the HD moniker (though it was not until the 2007 GMT900 model year a 3500HD debuted). A refresh for 2003 models was introduced in 2002, bringing slight design changes and an upgrade to the audio and HVAC controls. The 2007 GMT800 trucks, built after the new GMT900 had gone on sale, used the name Classic to denote the difference between the two generations.