Launched in early 2003, the Silverado SS is a factory high-performance truck. General Motors dropped Quadrasteer from the Sierra Denali after the 2004 model year and its entire lineup after 2005 due to poor sales of this expensive option. It was a 4-wheel steering system that greatly reduced the truck's turning radius and improved lane changing while towing. The Sierra Denali was initially equipped with Delphi's Quadrasteer system as standard equipment. The Denali is rated for towing 10,000 pounds (4,500 kg) and hauling 1,840 pounds (830 kg) in the cargo box. For 2002, the name was changed to Sierra Denali, but the specifications remained essentially the same except for the addition of Quadrasteer and GM changed from the 4L60E-HD to the 4L65E in conjunction with a 4.10 final drive gear ratio. It was coupled to a 4L60E-HD 4-speed automatic transmission along with other upscale equipment. It used all-wheel drive with a 3.73 final drive gear ratio and included the 6.0 L Vortec 6000 LQ4 V8 rated at 325 hp (242 kW) at 5000 rpm and 370 lb⋅ft (502 N⋅m) of torque at 4000 rpm. GMC created an upscale version of its Sierra 1500 in 2001 called the Sierra C3. The Insurance Institute for Highway Safety (IIHS) gave the Silverado an overall "marginal" score on the frontal offset crash test for poor structural integrity and poor dummy control, although no injuries were recorded on the dummy's body regions. During the 2005 model year, all light-duty GMT800 pickups reverted to front disc/rear drum brakes as a cost-cutting measure heavy duty trucks and the SUVs retained their 4-wheel disc brakes. Its SUV counterparts, the Suburban, Tahoe, and Yukon retained the use of the pre-facelift sheet metal. In addition to that, Chevrolet has removed their own word scripting off the tailgate that was used from 1998 to 2005. In 2006 the Silverado received another facelift, similar to the HD version introduced on 2005 HD models. GM introduced a reworked version of the Silverado and Sierra in 2003, with a new front end and a slightly updated rear end. The C3 became the Denali for 2002 (derived from the pre-existing 1999 GMC Yukon Denali), and Quadrasteer was added. The Silverado Z71 got an optional lighter composite box, with a suspension package for towing, but lacked the high-output engine. The 6.0 L Vortec 6000 V8 was standard on the 2500 and was added for the 2001 Heavy Duty models, rated at 300 hp (224 kW), with the GMC Sierra 1500 C3 getting an uprated 325 hp (242 kW) version of this engine. Output on the 5.3 L engine also increased to 285 hp (213 kW) and 325 lb⋅ft (441 N⋅m). In 2000, a driver's side door option became available for the extended cab, giving it four doors, and the crew-cab body was added to the lineup in 2004. The short box is only available with the crew cab and extended cab.įor the first year, only a regular cab and 3-door extended cab were available, along with the Vortec 4300 V6, Vortec 4800 V8, and the Vortec 5300 V8. They are available in three cab lengths, 2-door standard/regular cab, 3 or 4-door extended cab, and later, a front-hinged 4-door crew cab. There are a number of models of light-duty Silverados and Sierras, including the half-ton, SS, and Hybrid. Development sign-off was issued in late 1997, with pre-production and series production commencement in June 1998. A new design was chosen and finalized for production in June 1995, 36 months ahead of the scheduled start in June 1998. In January 1993, GM began development on the GMT800 pickup program with numerous teams coming together. 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. A small refresh for 2003 models was introduced in 2002, bringing slight design changes and an upgrade to the audio and HVAC controls. 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. Built on the new GMT800 platform, the Silverado/Sierra 15 pickup trucks were first released in August 1998 as 1999 models. 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.
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