Chevrolet Tahoe Hybrid
From GM press: The 2008 Chevy Tahoe Hybrid helped introduce the two-mode hybrid’s green technology to full-size SUVs. In 2004, GM, BMW and DaimlerChrysler engineers set out to jointly develop a two-mode hybrid system suitable for full-size cars and SUVs. A system developed by GM's Allison transmission division for use on transit buses, was the starting point. The two-mode hybrid system channels gas and electric motive power through an electronically variable transmission, enabling a significant improvement in fuel economy, compared to standard gas-engine power trains. Chevrolet Tahoe and Silverado models with the two-mode system are still the fuel economy leaders in their segments, with EPA estimated 20 mpg city and 23 mpg highway.