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GM 6.2L EcoTec V8 rated at 21 mpg by the EPA

General Motors is already laying claim to best-in-class power for its new 6.2-liter V8 that will be offered in the 2014 Chevy Silverado and GMC Sierra this fall, and now it has released fuel economy numbers for the big engine. Available as an option on the Silverado LTZ and High Country (shown above) models as well as the the Sierra SLT and Denali trims, the 6.2L EcoTec3 V8 will return 15 miles per gallon in the city and 21 mpg on the highway on rear-wheel-drive trucks; these numbers drop by one mpg each on four-wheel-drive models.
These estimates are in addition to the engine's 420 horsepower, 460 pound-feet of torque and max trailering capacity of 12,000 pounds, and considering all that power it's not terribly far away from the fuel economy of GM's equally new 4.3-liter V6 and its rating of 18 mpg city and 24 mpg highway. This announcement comes just days after a report indicated that GM is unable to keep up with the demand of the 5.3-liter V8 in the fullsize Chevy and GMC trucks due to supplier issues. GM's official press release for the 6.2-liter V8's fuel economy is posted below.

Fullsize GM SUVs have a problem that's making owners sick

Some fullsize SUV owners are getting sick, thanks to a buffeting and vibration problem in 2015 model year examples of the Chevy Tahoe and Suburban, Cadillac Escalade, and GMC Yukon. According to owners' complaints to the National Highway Traffic Safety Administration, the issue can vary from an annoying vibration inside the cabin to an experience so severe that it leads to dizziness and headaches. General Motors is aware of the complaints, but the fix isn't so simple. According to spokesperson Tom Wilkinson to Autoblog, the company "has been tracking this issue for a while." The problem has a fairly low incidence rate, but when it does occur the issue can be "uncomfortable and annoying for owners." There's no precise cause for the issue, Wilkinson claims, and in some cases, simply balancing the tires or changing the door seals can make it go away. However, not all of the fixes are so simple. AutoGuide dug deep into the problem and discovered a GM preliminary information bulletin that advised dealers to remove the headliner and to check the roof's bonds to the bows that go across the vehicle. However, that document included a note that the solution might not entirely eliminate things. According to AutoGuide, adding Dynamat insulation to the roof sometimes helped the problem. A GM spokesperson also told AutoGuide the company fixed the problem at the end of the 2015 model year, and didn't go into any more detail. This roof issue seems linked to some of the worst droning in these SUVs. According to one complaint from a 2015 Suburban owner to NHTSA: "Roof will not remain attached to the roof bows. This causes the buffeting similar to a window being down when all are up. The results span from annoying to painful." A 2015 Yukon owner claims to have another alleged cause for the problem in a NHTSA complaint from February 2015. This person brought their SUV to the dealer seven times over the course of four weeks for vibrations. The dealer replaced the driveshaft, suspension components, and more, but nothing worked. According to an engineer to the service adviser: "In an effort to prevent roll overs, they designed the frame and body mounts too stiff. There are 40 engineers working on issues, they have no solutions that work across the board." Wilkinson told Autoblog that GM is working with customers on an individual basis to rectify things. Since these are newer vehicles, dealers should also fix the problem under warranty.

Disabled man realizes dream of driving with converted pickup truck

A man with a devastating illness is mobile once again thanks to a heavily modified pick up truck. He hopes he can help others in his situation gain the freedom of mobility they need to lead a normal life. Chris Sauerbaum has a physical disability resulting from chronic inflammatory polyneuropathy, a form of muscular dystrophy where the sufferer's immune system attacks their nerves. Sauerbaum lost both of his legs and is bound to a wheelchair. After 11 years of trying, he finally has a vehicle that he can drive. "You might as well be driving a Lamborghini," Sauerbaum told the York Dispatch as the driver side door extended to a lift to accommodate Sauerbaum's wheelchair. "Everyone comes up and talks to you. You come out looking like a Transformer." It wasn't easy getting transportation that fit his needs. First he bought a Chrysler PT Cruiser, which wasn't large enough to handle the equipment needed to convert the car for a legless driver. In 2013, Sauerbaum and his wife Heather Sloat appealed to local businesses and friends for donations. They raised $10,000 and were able to put a downpayment on a GMC Sierra. The truck then underwent $91,000 worth of upgrades. It was completely outfitted for Sauerbaum, with a large lift to bring his wheel chair up to the driver's seat and joysticks doing the work of peddles and the steering wheel. New York's Office of Vocational Rehabilitation paid for the conversion. "Think of it as a big remote controlled car. An 8,000 pound R/C car," Sauerbaum told the Dispatch. After a week and a half of learning the controls, Sauerbaum was able to drive with confidence again. He will no long need to rely on his wife to get him two and from work, an 80-mile trip each day. Sauerbaum and Sloat hope to start a nonprofit called Drive for Independence that will assist other wheelchair-bound people with the costs of getting a converted vehicle that suits their needs. "It's just one piece of the puzzle to get people to work," Sloat told the Dispatch. Related Video: Weird Car News GMC Driving Ownership Truck Videos disabled ms