Lambda is General Motors full-size or mid-size 3-row crossover SUV automobile platform.

It is largely derived from the GM Epsilon platform, which underlies the Chevrolet Malibu sedan and similar models.

The 2007 Outlook and GMC Acadia went into production in late 2006, followed by the 2008 Enclave in mid-2007, and the 2009 Chevrolet Traverse in mid-2008.

Starting with the 2009 model year all Lambda vehicles have GM LLT 3.6-liter gasoline direct injection engine for improved fuel efficiency, horsepower and torque.

Meanwhile, GM announced a facelift of its GMC Acadia for the 2013 model year, taking the bodyshell of the discontinued Saturn Outlook, while at the same time, GM would refresh its Buick Enclave & Chevrolet Traverse vehicles.