The SRX comes with the option of a 260 hp 3.6-liter V-6 or a 320 hp 4.6-liter Northstar V-8 engine. It can seat 5 or, with an optional third row, a total of 7 passengers is possible. 17' wheels are standard on base models and the V-8 comes with larger 18' wheels. OnStar safety support and a BOSE audio system are also standard. Cadillac's all-wheel-drive system is able to transfer power to different wheels to increase traction and power delivery.For 2007, the Cadillac SRX receives an all new interior. In the V8 model a new 6-speed automatic transmission replaces the 5-speed.