The Lambda hybrids are a different story entirely. According to Brian Corbett, GM's spokesman for Hybrid programs, there are no immediate plans to build a hybrid version of the Lambdas. In fact, during a conversation we had with Bob Lutz at the LA Auto Show, he indicated that the existing front-wheel-drive, two-mode transmission would not fit in the Lambda's engine compartment as it wasn't wide enough. According to Corbett, a second generation version of the two-mode system was under development, but that is at least three to four years away from launch. The mild hybrid system that is currently installed on the Saturn Vue and Aura is designed for smaller vehicles and wouldn't be suitable for the larger Lambdas in its current form. A second-generation version of that system is also under development using a lithium-ion battery and should appear somewhere around 2010-11, which may work in these big wagons. Given the new fuel economy regs, GM is sure to do something with the Lambdas, although dropping in the Cadillac 2.9-liter diesel V-6 might be an even better option that would also help towing capability.
[Source: AutoblogGreen, General Motors]