The 2011 Chevrolet Silverado HD and the GMC Sierra HD trucks even if have similar looks with their previous versions, bring some improvements including redesigned grilles, power dome hoods and full-width front bumpers. But the most important changes will be seen under the hood where these Chevrolet trucks have a redesigned frame, improved engines and transmission combos, new front and rear suspensions and an upgraded brake system.
The interior of both the 2011 Chevrolet Silverado and the GMC Sierra is covered in cloth and features CD player, OnStar assistance, XM satellite radio, cruise control, power windows, power heated mirrors and remote keyless entry. All these features are improved for all the three trim levels available for these 2011 Chevrolet trucks.
Both the 2011 Chevrolet Silverado HD and the 2011 Sierra HD are powered by a 6.0 liters Vortec V8 engine with a new camshaft profile. Along with the valve timing system, this engine is capable to provide much more torque at low rpm. The engine’s power is delivered through the 6L90 six-speed automatic transmission. As an optional feature, the 2500 and the 3500 HD trucks can be equipped with 6.6 liters Duramax turbocharged diesel engine which transforms these Chevrolet trucks in more powerful and fuel efficient cars. In addition to this, the 2011 Chevrolet Silverado and the Sierra HD include other improvements such as the catalytic after-treatment system that reduces the NOx emissions, an exhaust brake system and higher pressure fuel injectors. This new Duramax diesel engine uses a new Allison 1000 six speed automatic transmission which helps the driver handle the car when the power increases. To reduce slippage, the engineers use internal components which improve both the fuel economy and the power of the rear wheels.
The 2011 GM trucks have new redesigned boxed frame manufactured with additional high strength steel to reduce flex and twist. The engineers used a larger engine and transmission mounts to control the vibration and the harshness. On the Extended Cab and the Crew Cab trucks, the engineers used hydraulic mounts placed under the cabin. When it comes to the suspension, these two Chevrolet trucks use an independent front suspension with upper and lower control arms which is perfect for the heavier loads.
The 2500 HD version is equipped with two-stage springs that improves the ride even if the truck is loaded or not. When the truck is loaded a second step springs offers an extra support. The 3500 HD trucks are equipped with three-stage springs to help with heavier loads.
The braking system helps handle the increased load capacity. As a result, the steering arms are larger while the steering gearbox and the pump are capable to support a higher pressure. Moreover, the calipers, the brake discs and the booster calibration are upgraded to help the driver stop the truck.
Something interesting about the Sierra HD truck is the opportunity of choosing the upscale Denali edition. This is available only for the 2500 Crew Cab version and includes a lower valance, body colored front bumper, wood and brushed aluminum trim placed on the dashboard and on the doors. The heated and cooled seats are available as optional features.
General Motors tried to manufacture strong, reliable, fuel efficient and clean burning trucks which can be perfect for all your needs. If you’re interested in buying one of these Chevrolet trucks you must know that the 2011 GMC Sierra models cost between $27,965 and $45,865 while the Silverado’s HD price starts at $27,965 and goes up to $40,350. But if you want all features included, these Chevrolet trucks can cost up to $80,000.