GMT900

The GMT900 truck platform debuted at the 2006 North American International Auto Show, as basis for the next generation of General Motors full-size pickups and SUVs, and replacements for the GMT800 vehicles. The first GMT900 vehicle introduced was the next-generation Chevrolet Tahoe.

Main article: List of GM platforms

GMT900
Overview
Manufacturer	General Motors
Production	2005–2013
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)	4.8 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 4L65-E automatic 6-speed 6L80 automatic
Dimensions
Wheelbase	116.0 in (2946 mm)
Chronology
Predecessor	GMT800
Successor	GMT K2XX

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 this appears to have been cancelled.

Short wheelbase (Yukon/Tahoe) GMT900 production began at GM's Arlington Assembly plant in Arlington, Texas on December 1, 2005, six weeks ahead of schedule. 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, while the Escalade will be based in Arlington.

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. 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 (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.[2]

The automotive press has speculated that some GMT900 SUV models may move to the GM Lambda platform.[3]

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

Applications

• 
  2007 Cadillac Escalade
• 
  2007 Chevrolet Suburban
• 
  2007 Chevrolet Avalanche
• 
  2009 GMC Sierra Hybrid

Basic platform	Years	Model	Notes	Code	Introduction	Production	Sale
GMT900	2007-2013	Chevrolet Silverado	Regular Cab Extended Cab Crew Cab	GMT901	August 2, 2006 at The Texas State Fair	Silao Fort Wayne Oshawa August–September 2006 Flint	Fall 2006
		GMC Sierra	Regular Cab Extended Cab Crew Cab	GMT902
GMT910	2007-2014	Chevrolet Silverado	HD	GMT911
		GMC Sierra	HD	GMT912
GMT920	2007-2014	Chevrolet Tahoe	4-door SUV	GMT921	NAIAS  January 2006	Arlington December 1, 2005 Janesville early  2006	January 2006
		GMC Yukon		GMT922
		Cadillac Escalade		GMT926		Arlington January 1, 2006
GMT930		Chevrolet Suburban	4-door extended SUV	GMT931	GLAAS  January 2006	Janesville  March 2006 Silao  March 2006	April 2006
		GMC Yukon XL		GMT932
		Cadillac Escalade ESV		GMT936		Arlington  March 2006	May 2006
GMT940	2007-2013	Chevrolet Avalanche	4-door pickup/SUV	GMT941	CAS  February 2006	Silao
		Cadillac Escalade EXT		GMT946		Arlington  March 2006	May 2006

References

1. "General Motors Death Watch 69: Running Out of Gas". The Truth About Cars. April 27, 2006. Retrieved 2009-06-01.
2. Vlasic, Bill; Bunkley, Nick (October 25, 2008). "General Motors, Driven to the Brink". New York Times. Retrieved 2009-06-01.
3. "Cadillac Escalade to go Lambda". Left Lane News. September 9, 2008. Retrieved 2009-06-01.

• "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.
• "Tahoe's Heady Mission". Ward's AutoWorld. Archived from the original on September 30, 2007. Retrieved March 8, 2006.
• "Escalade ESV, EXT Due in May". Ward's AutoWorld. Retrieved March 8, 2006.

See also

• GM GMT platform