A new, larger and more powerful 3.6L direct-injected V-6 ? known by its "LFX" engine code ? is the new and sole engine for the SRX. It delivers an SAE-certified 308 horsepower (230 kW) and 265 lb.-ft. of torque (359 Nm).
The LFX is a 60-degree design, with the cylinder block and cylinder heads cast in aluminum for low weight. A forged steel crankshaft provides optimal strength in the bottom end, while the cylinder heads include four valves per cylinder, with a dual overhead camshaft design incorporating infinitely variable cam phasing.
Additionally, optimized-flow fuel injectors and the integrated exhaust manifolds/cylinder heads promote lower emissions. The LFX's composite intake manifold also has a comparatively small radiated surface area to help it maintain excellent noise and vibration characteristics.
The Hydra-Matic 6T70 six-speed automatic transmission is matched with the LFX engine and features the driver-selectable Eco feature for enhanced fuel economy. The available all-wheel-drive system incorporates an electronic limited-slip rear differential, which not only improves traction in slippery road conditions but provides side-to-side torque transfer along the rear axle to enhance control during hard cornering.
SRX chassis and suspension
The SRX has a four-wheel independent suspension system and a standard rack-and-pinion hydraulic steering system ? and offers a variable-effort, speed-sensitive steering system ? with tuning biased for sport sedan-style driving and strong on-center feel. StabiliTrak electronic stability control is standard and works in concert with the standard four-wheel-disc/four-channel-ABS braking system.
Additional features and details include:
An independent McPherson strut suspension system is standard on all models, featuring a direct-acting stabilizer bar and hydraulic ride bushings.
An independent "H-arm" rear suspension incorporates a lightweight hollow stabilizer bar.
Power-assisted rack-and-pinion steering is standard on Base and the Performance Collection.
Power-assisted variable-effort and speed-sensitive rack-and-pinion steering system is standard on the Performance and Premium Collections.
Rear axle ratio is 3.39 on all models.
A trailering package is available on the Luxury, Performance and Premium Collections and increases the towing capacity to 3,500 pounds (1,587 kg).
SRX safety and crash avoidance features
The SRX is designed to protect occupants before, during and after a crash. A strong body structure and chassis that absorb crash energy are complemented by martensitic steel in the fully enclosed rocker sections. Martensitic steel is one of the strongest available and its use in the rockers helps protect against intrusion during a side-impact crash while also helping maintain the structure during front and rear crashes.
Additional safety features include:
Dual-stage frontal and side-impact driver and right-front passenger air bags.
Head-curtain side-impact air bags.
Rollover mitigation sensors.
Front safety belt pretensioners and load limiters.
Tire pressure monitoring system.
Trailer stability assist.
Rearview camera system.
The SRX is also designed to meet European pedestrian protection standards; and the front bumper is positioned for greater compatibility with car bumpers.
OnStar details
OnStar is standard on all models. It uses GPS and cellular phone technology to automatically call for help in the event of crash. OnStar subscribers also can use the service to be Good Samaritans by sending help to other motorists, and to call for help in other non-crash emergencies.
OnStar is the leading provider of in-vehicle safety, security and information services in the United States and Canada. One year of complimentary OnStar Directions and Connections service with Turn-by-Turn Navigation for easier route guidance on all models. The feature is easy to use because all directions are sent to the car by an advisor, without the need to stop. Turn-by-Turn can be cost-effective, since map updates and aftermarket navigation systems are not needed. Stolen Vehicle Assistance helps police track the vehicle. myCadillac and OnStar myLink mobile apps offer vehicle information and OnStar services via the customer's smartphone.