Manufacturer General Motors Class Full size SUV | Production 1999–2006 Layout FR/AWD | |
 | ||
Body style(s) 4-door wagon
4-door extended wagon
2-door pickup truck
4-door pickup truck Transmission(s) 4-sp 4L60-E automatic
4-sp 4L65-E automatic | ||
The GMT800 was the basis for the previous generation Chevrolet Silverado full-size pickup truck. The derived GMT820 and GMT830 was used in the Suburban, among other full-size SUVs. This was the successor to the GMT400 series of C/K pickups and SUVs, and was replaced for 2007 by the GMT900 line.
The GMT 800 platform was introduced in 1999. Frames were manufactured by Magna International in Ramos Arizpe, Coahuila, Mexico and St. Thomas, Ontario, Canada. Final assembly is in Oshawa, Ontario; Pontiac, Michigan; Fort Wayne, Indiana; and Silao, Mexico. The GMT820-based Hummer H2 was built under contract by AM General at a specially-constructed plant in Mishawaka, Indiana.
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. 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 created to mix and match for nearly 40 different truck configurations.