2010 Cadillac Escalade Hybrid is the glitziest of GM's three mechanically identical, full-size hybrid SUVs, including the 2010 GMC Yukon Hybrid (Base MSRP: $51,185 to $61,345) and 2010 Chevrolet Tahoe Hybrid (Base MSRP: $50,720 to $53,525). A revised rear-axle ratio for 2010 brings the rear-wheel-drive Escalade Hybrid's estimated fuel economy in line with the lighter, aerodynamically tweaked