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Watch the live reveal of the 2014 Chevy Silverado and GMC Sierra [UPDATE]

UPDATE: The trucks have been revealed. Click here for all of the official details.
As promised, Chevrolet and GMC are offering a live webcast of the world premiere for the all-new 2014 Silverado 1500 and Sierra 1500. After being teased with spy shots and blurry images like the one above for ages, now is the time to see the trucks in the metal, for real (well, as 'real' as it gets on a webcast, at any rate).
Shift your eyes down just below to see the reveal as it happens, starting at 9:30 AM EST. We anticipate having loads of images full technical information to share after the webcast, too, so truck aficionados should stay tuned. We'll also be bringing you live images of both trucks too, when we see them on the show floor at next month's Detroit Auto Show.

How GM engineers are using diaper 'snow' to keep you warm

Testing how snow affects General Motors' vehicles isn't really a problem right now for the company's engineers, but in the dog days of summer the process isn't exactly easy. The only real option is for them to book time at the automaker's climatic wind tunnel. However, a flash of brilliance from an engineer allows snow to be simulated regardless of the temperature outside, and the discovery is all because of his daughter's wet diaper. The realization came to GM Thermal Systems engineer Nicholas Jahn while he was swimming with his daughter and noticed how her diaper ballooned in size in the water. He found out the substance that makes this possible is called sodium polyacrylate. When the material gets wet it grows and forms fluffy flakes that are a close imitation of snow. Best of all, the stuff can be prepared easily any time of the year, and it's reusable. The engineering team uses the material to test the effectiveness of the heating systems of GM's vehicles. They spread the sodium polyacrylate over the inlets at the base of the windshield to obstruct the airflow and then crank the heater. After some time, they can see how much is being sucked into the system and design more efficient systems in the future. See how the process works in the video above and read about the diaper discovery in GM's press release below. Diapers Change Chevy Cruze Winter Warm-up Time GM validation engineer uses diaper material "snow" to reduce frigid drives 2015-01-06 DETROIT – An item commonly found on an infant's changing table is helping General Motors' engineers simulate snow year round, ensuring heating systems in cars like the 2015 Chevrolet Cruze can quickly and efficiently warm its interior. Packed snow can prevent air from entering the inlet panel at the bottom of the windshield, obstructing the flow of air into the heating system and reducing the amount of air it can push out. This can lead to less efficient warming of the car's interior and windshield defrosting. "The last thing anyone wants to do when it's freezing cold out is scrape their windshield," said Nicholas Jahn, GM Vehicle Thermal Systems engineer. "The testing we perform on the Chevrolet Cruze with the diaper material allows us to maximize the car's heating capabilities." Ironically, Jahn stumbled upon his diaper-based testing method in the middle of summer. During a swim with his daughter, he noticed her diaper multiplied in size when it came into contact with water.

Genovation Cars readies all-electric Corvette prototype

Chevy runs the full spectrum from some of the most environmentally friendly cars to the least. At one end are EVs like the Spark and Volt. At the other, performance models like the Camaro and Corvette. But one American company wants to bridge that divide. That company is Rockville, MD-based Genovation Cars, which reports that it is almost done building its prototype for an all-electric Corvette. Dubbed the Genovation Extreme Electric (or GXE for short), the prototype is based on a previous-generation 2006 Chevy Corvette Z06, but ditches its enormous 7.0-liter V8 for an array of inverters, batteries, and electric motors said to be good for over 700 horsepower and 600 pound-feet of torque. That promises to deliver a 0-60 time of about 3.0 seconds and a top speed in excess of 200 miles per hour. Those are supercar benchmarks for performance if we've ever seen them, and ought to leave even the top-spec Tesla Model S P85D in... well, not a cloud of smoke, but whatever the electric equivalent is, in a non-polluting cloud of that. The GXE is also supposed to be able to travel for 150 miles on a single charge, and handle well while it's at it with 50/50 front-rear weight distribution and a low center of gravity. Sorta like the Power Wheels 'Vette pictured above, then, but bigger and faster. Look for the GXE to debut at the Electric Vehicle Technology Expo this coming September in Michigan, after which Genovation says it will put the GXE to the test on the track to back up its performance claims. Genovation Cars Nearing Completion of High-Performance All-Electric Corvette, the GXE ROCKVILLE, Md.--(BUSINESS WIRE)--Genovation Cars is nearing the completion of a prototype high-performance all-electric Corvette called the Genovation Extreme Electric or GXE. Assembly of the GXE will be completed by the end of July, followed by a three-week testing phase. The GXE is based on a 2006 Z06 Corvette. Several contributors to the GXE effort have helped design and build record-breaking electric vehicles. They include an MIT electrical engineer and a mechanical engineer from Cosworth. "We are using state of the art inverters, batteries and electric motors that will produce in excess of 700-hp and 600 lb-ft of torque," said Genovation CEO Andrew Saul. "We expect the car to achieve 0-60 mph in around three seconds and have a top speed of over 200 mph.