GMT900
Overview
Manufacturer	General Motors
Production	2007–2013
Body and chassis
Class	Full-size pickup truck/SUV
Layout	FR/AWD
Body style(s)	4-door SUV 4-door extended SUV 2-door pickup truck 4-door pickup truck
Powertrain
Engine(s)	4.3 L Vortec 4300 V6 4.8 L Vortec 4800 V8 5.3 L Vortec 5300 V8 6.0 L Vortec 6000 V8 6.2 L Vortec 6200 V8
Transmission(s)	4-speed 4L60-E automatic 4-speed 4L65-E automatic 6-speed 6L80 automatic
Dimensions
Wheelbase	116.0 in (2946 mm)
Chronology
Predecessor	GMT800
Successor	GMT K2XX

The GMT900 is a General Motors full-size pickup 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 their 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.^[1]

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.^[2] Production of the SWB versions began at Janesville Assembly in Janesville, Wisconsin in early January 2006. Production of long wheelbase trucks (Suburban/Yukon XL) begins in Janesville and at Silao Assembly in Silao, Guanajuato, in March. The Avalanche will be 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.^[3]

The SUVs began to show up at dealers in January 2006. Sales initially exceeded expectations, but by 2008, General Motors announced they were 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.^[3] The Hummer H2 was meant to move to the new platform in the next few years, but has since been cancelled (although the engines and gauge cluster shape has been carried over).

Due to a long-lasting downturn in sales of full-size trucks and SUVs in the United States (up to a 30% down through the first nine months of 2008), General Motors cancelled the next-generation CXX truck program in May 2008. Along with it, the replacements for the Chevrolet Tahoe and Suburban and their siblings at GMC and Cadillac.^[4]

The automotive press has speculated that some GMT900 SUV models may move to the GM Lambda platform.^[5]

On January 14, 2010, General Motors announced that they will resume development of full-size trucks and SUVs.^[6]

Applications

• 
  2007 Chevrolet Suburban
• 
  2007 GMC Yukon XL
• 
  2011 Chevrolet Tahoe
• 
  2010 GMC Yukon
• 
  2007 Chevrolet Avalanche
• 
  2007 Cadillac Escalade ESV
• 
  2007 Cadillac Escalade
• 
  2007 Cadillac Escalade EXT
• 
  2007 Chevrolet Silverado
• 
  2007 GMC Sierra

References

• "Crucial GM Full-size Truck Program Launches Early". Ward's AutoWorld. Retrieved December 9, 2005.
• "New Trucks Won't Save GM". Ward's AutoWorld. Archived from the original on February 8, 2006. Retrieved March 8, 2006.

See also

Wikimedia Commons has media related to GMT900.

• GM GMT platform