GMT900


The GMT900 is a General Motors full-size pickup truck and SUV platform used from the 2007 to 2014 model years. The platform was introduced at the 2006 North American International Auto Show, as the replacement for the GMT800 platform. The first GMT900 vehicle introduced was the next-generation Chevrolet Tahoe.
GMT900 had been called a "Hail Mary pass" for the General Motors Corporation—the company needed the revenue from these large trucks to ensure its financial solvency. The company's resources were focused exclusively on GMT900 development through 2005, delaying other programs like the GM Zeta platform. With the 2005 spike in gasoline prices, some analysts have questioned the wisdom of "betting the company" on a line of large trucks. Sales were initially brisk, but later dropped off as the market moved to more fuel-efficient unibody vehicles.
The GMT900 series features standard vehicle stability control. Original plans called for American Axle's "I-Ride" independent suspension module in the rear, but was never used.
Tahoe production began at GM's Arlington Assembly plant in Arlington, Texas, on December 1, 2005, six weeks ahead of schedule. Production of the SWB SUVs began at Janesville Assembly in Janesville, Wisconsin, in early January 2006. Production of long-wheelbase SUVs began in Janesville and at Silao Assembly in Silao, Guanajuato, in March. The Avalanche was produced only in Silao, and Escalade production began in March 2006, with the ESV being produced in Arlington and the EXT being produced in Silao.
The SUVs began to show up at dealers in January 2006. Sales initially exceeded expectations, but by 2008, General Motors announced it was significantly cutting back production. GM has closed the SUV plant in Janesville, Wisconsin, consolidating SUV production in Arlington, Texas.
The related Silverado and Sierra pickups started production in late 2006. The Hummer H2 was meant to move to the new platform in the next few years, but has since been cancelled.
Due to a long-lasting downturn in sales of full-size trucks and SUVs in the United States, General Motors cancelled the next-generation full-size truck program in May 2008, including the replacements for the Chevrolet Tahoe and Suburban and their siblings at GMC and Cadillac. The automotive press had speculated that some GMT900 SUV models may move to the GM Lambda platform. However, on January 14, 2010, more than six months after its bankruptcy, General Motors announced that it would resume development of full-size trucks and SUVs.

Applications

Basic platformYearsModelNotesCodeIntroductionProductionSale
GMT9002007–2013Chevrolet SilveradoRegular Cab
Extended Cab
Crew Cab		GMT901August 2, 2006, at The Texas State FairSilao
Fort Wayne
Oshawa August–September 2006
Flint		Fall 2006
GMT9002007–2013GMC SierraRegular Cab
Extended Cab
Crew Cab		GMT902August 2, 2006, at The Texas State FairSilao
Fort Wayne
Oshawa August–September 2006
Flint		Fall 2006
GMT9102007–2014Chevrolet Silverado HDHD pickupGMT911
GMT9102007–2014GMC Sierra HDHD pickupGMT912
GMT9202007–2014Chevrolet Tahoe4-door SUVGMT921NAIAS January 2006Arlington December 1, 2005
Janesville early 2006		January 2006
GMT9202007–2014GMC Yukon4-door SUVGMT922NAIAS January 2006Arlington December 1, 2005
Janesville early 2006		January 2006
GMT9202007–2014Cadillac Escalade4-door SUVGMT926NAIAS January 2006Arlington January 1, 2006January 2006
GMT9302007–2014Chevrolet Suburban4-door extended SUVGMT931GLAAS January 2006Janesville March 2006
Silao March 2006
Arlington 2006		April 2006
GMT9302007–2014GMC Yukon XL4-door extended SUVGMT932GLAAS January 2006Janesville March 2006
Silao March 2006
Arlington 2006		April 2006
GMT9302007–2014Cadillac Escalade ESV4-door extended SUVGMT936Arlington March 2006May 2006
GMT9402007–2013Chevrolet Avalanche4-door pickup/SUVGMT941CAS February 2006Silao
GMT9402007–2013Cadillac Escalade EXT4-door pickup/SUVGMT946Silao March 2006May 2006