GMT800
| GMT800 | |
|---|---|
| Overview | |
| Manufacturer | General Motors |
| Production | 1999–2006 |
| Body and chassis | |
| Class | Full size SUV |
| Layout | FR/AWD |
| Body style(s) |
4-door wagon 4-door extended wagon 2-door pickup truck 4-door pickup truck |
| Powertrain | |
| Engine(s) |
4.3 L V6 4.8 L V8 5.3 L V8 6.0 L-V8 8.1 L-V8 6.6 L V8 Turbodiesel |
| Chronology | |
| Predecessor | GMT400 |
| Successor | GMT900 |
The GMT800 was a General Motors full-size truck platform used from the 1999 through 2006 model years. It underpinned the Chevrolet Silverado and GMC Sierra pickups; the derived GMT820 and GMT830 were used for the Chevrolet Tahoe/GMC Yukon and the Chevrolet Suburban/GMC Yukon XL full-size SUVs, respectively. This platform was the successor to the GMT400 series of C/K pickups and SUVs, and was replaced for 2007 by the GMT900 line.
The GMT800 frames were manufactured by Magna International in Ramos Arizpe, Coahuila, Mexico and St. Thomas, Ontario, Canada. Final assembly of trucks was done in Oshawa, Ontario; Pontiac, Michigan; Fort Wayne, Indiana; and Flint, Michigan; for pickup & chassis cab models, and Silao, Mexico; Janesville, Wisconsin; and Arlington, Texas; for SUV models. The GMT820-based Hummer H2 was built under contract by AM General at a specially-constructed plant in Mishawaka, Indiana. A GMT810 2 door SUV variant was designed and prototyped, but was not put into production.[1]
The GMT800 introduced a three-section frame system, which could be mixed and matched depending on the wheelbase, GVWR, and body type fitted to the platform, rather than a single piece long frame. The front section was hydroformed, while the middle and rear sections were roll formed or stamped, depending on application. This gives greater flexibility to the platform. A total of four front modules, seven midsections, and four rear sections were designed, and supported nearly 40 different truck configurations.
The GMT800 was the first truck usage of the then-new GM Generation III V8 engines. The 4.8 and 5.3 L versions featured iron blocks and aluminum heads, while the 6.0 L version used iron in both the block and heads.
Sales
| Year | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 |
|---|---|---|---|---|---|---|---|
| Total sales | TBD | TBD | 1,569,198 | 1,672,804 | 1,810,340 | 1,704,239 | 1,491,084 |
Applications
2003 GMT800 Cadillac Escalade EXT
2006 GMT800 Chevrolet Silverado
2004 GMT800 GMC Yukon
2002 GMT800 GMC Sierra
| Basic platform | Years | Model | Notes |
|---|---|---|---|
| GMT800/880 | 1999–2006 | Chevrolet Silverado | Some Late 06 models were sold as 07's and are referred to as the 07 Classic so as not to be confused with the New GMT900 Series |
| 1999–2006 | GMC Sierra | Some Late 06 models were sold as 07's and are referred to as the 07 Classic so as not to be confused with the New GMT900 Series | |
| GMT820 | 2002–2006 | Cadillac Escalade | |
| 2000–2006 | Chevrolet Tahoe | ||
| 2000–2006 | GMC Yukon | ||
| 2003–2009 | Hummer H2 | A unique platform, the front used a modified utility frame, the midsection was all new and completely boxed. The rear section used an upgraded frame for the 8,600 pounds gross vehicle weight. | |
| GMT830 | Cadillac Escalade ESV | ||
| Chevrolet Suburban | |||
| GMC Yukon XL | |||
| GMT805 | Chevrolet Avalanche | ||
| GMT806 | Cadillac Escalade EXT |
See also
 |
Wikimedia Commons has media related to GMT800. |
References
- ↑ Auto Plans Plenty Ward's AutoWorld