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1999–2002 Silverado 1500 Extended Cab 2001–2002 Silverado 2500HD Regular Cab The light-duty trucks used the 1500 and 2500 names. They are available in three cab lengths: a 2-door standard/regular cab, 3- or 4-door extended cab, and for 2004, a full front-hinged 4-door crew cab (derived from the 2001 HD trucks).
A new "Generation 4" 1000 was introduced in 2005 that added a 6th gear at the very top of the ratio ladder, making it a double-overdrive. For the 2006 model year, manual gear selection was introduced. This feature gives the driver greater control over the transmission, enhancing operation when engine braking or less frequent shifting is desired.
6.2L fitted to a 1987 HMMWV. The original 6.2 L (379 cu in) diesel V8 was introduced in 1982 for the Chevrolet C/K and was produced until 1993. The 6.2L diesel emerged as a high-fuel-economy alternative to the V8 gasoline engine lineup, and achieved better mileage than Chevrolet's 4.3L V6 gasoline engine of the 1980s, at a time when the market was focused on power rather than efficiency.
The GMT900 generation of the Silverado/Sierra arrived in the last quarter of 2006 as a 2007 model. It features a redesigned exterior, interior, frame, and suspension as well as power increases on certain engines. Like the previous generation GMT800's and earlier C/K lines, it takes many styling cues from the GMT900 SUVs of the same year.
The Isuzu 6H is a family of inline six-cylinder diesel engines installed in Isuzu medium-duty trucks, and also installed in GM medium-duty trucks as the Duramax LG4. It is mated to the Allison 2500, 3000, and 3500 series transmissions.
Allison 1000 attached to Duramax 6.6 Diesel. The LMM (engine code "6") debuted part way through 2007 and ended production with the start of the 2011 calendar year and is mated to the 6-speed Allison transmission. The LMM was the only Duramax offered for model years 2007–2010. [6] A version was used in the Trident Iceni. [7]
On C4500/5500s, the 8.1L gasoline V8 returned from the GMT530 generation as the standard engine; the Caterpillar 3116 was replaced by an Isuzu-designed 6.6L Duramax diesel V8. [12] For the C6500 and larger, diesel engines were standard, with an Isuzu-produced Duramax LG4 7.8L I6 as standard, with a 7.2L Caterpillar C7 (a redesigned 3126 ...
In contrast to the Hummer H1–designed and assembled by AM General, the Hummer H2 and Hummer H3 were developed by GM, receiving their own platform designations. Designated the GMT825, the H2 was derived from the GMT820 (Chevrolet Tahoe/GMC Yukon), with its own midsection frame design and a rear frame shared with the 2500-series GMT800 pickup trucks.