The 2014 GMC Sierra Regular Cab truck is getting ready to hit the dealerships, with a Double Cab configuration that will be available at that time as well. Eventually there will be three cab sizes and three bed lengths to pick and choose through, but what we have now is in the image. This one has a 6.5 foot bed and has gotten a host of other updates including better gas mileage, a quieter cab and reduced vibration and harshness – so basically it will feel more like driving a car and less like driving a rig, but it’s still all truck.
A major improvement that General Motors is especially proud of is the new aerodynamic engineering. The engineers used a high tech Aerodynamics Lab which was made up of a 750 foot long tunnel and a 43 inch diameter fan that produced an equivalent of 4,500 horsepower to generate winds up to 138 miles per hour. This allowed them to test every nook and cranny to make sure to design the 2014 GMC Sierra to be the most aerodynamically truck ever built.
Aerodynamic Engineer, Diane Bloch, commented, “We can’t stop air; we can only guide it through the path of least resistance. It’s like electricity, without the shock. The biggest misconception is that it’s all about single components. But a certain side mirror design doesn’t create a certain amount of drag, its interaction with the rest of the vehicle does. We discovered that in the computational analysis we perform. The most harmful air between the cab and bed was coming over the cab and down through the gap, so we paid the most attention to that specific area.”
Block also pointed out that keeping the tailgate up while driving is better for aerodynamics. This is because if the tailgate is down the benefits of the airflow are diminished. Having an aftermarket net is the worst thing you can do if you are looking to improve the aerodynamics.
Source General Motors