The Chevy Silverado is designed to offer a smooth ride and confident handling while delivering superior capability and power.The 4.8-liter V8 (302 hp/305 lb-ft of torque) and four-speed automatic are standard on Crew Cab and 4WD Extended Cab models with the standard bed. Safety features on all Silverado models include dual front airbags, anti-lock brakes, tire-pressure monitoring system, side-curtain airbags, and StabiliTrak electronic stability control with rollover mitigation technology. A raked windshield (angled at 57 degrees) and careful aerodynamic and body-building engineering make the truck quiet on the inside and contribute to fuel efficiency. GM boasts that the Silverado and GMC Sierra are the first full-size trucks to offer both 300 horsepower and EPA highway ratings of 20 miles per gallon or better. The front suspension uses coil-over shock absorbers and the rack-and-pinion steering gear is mounted to the engine cross member to provide enhanced control and feedback. The Silverado benefits from a rear axle design featuring shock absorbers mounted outboard and more upright for better dynamic control than that of the previous-generation models. Chevrolet says the interior of the Silverado is 20 percent quieter than its predecessor (pre-2007 and Silverado Classic models), thanks to enhanced insulation materials, much like those used in the company's sport utility vehicles, and to aerodynamic improvements that reduce wind noise.