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2014 Chevrolet Silverado and GMC Sierra debut all-new designs, three new engines

General Motors has finally dropped the curtain on the 2014 Chevrolet Silverado and 2014 GMC Sierra. Both trucks have undergone substantial revisions with updated versions of the company's 4.3-liter V6, 5.3-liter V8 and 6.2-liter V8 engines. In a shot across the bows of both Ford and Chrysler, GM says it won't use a V6 engine adapted from passenger car applications. Instead, it developed the 4.3-liter engine based on its proven truck-duty architecture.
All three mills will boast direct injection fuel systems as well as a new cylinder head design. Combined with a revised piston, the new engines feature a smaller combustion chamber with a compression ratio of 11:1 or higher depending on the application. Cylinder deactivation and continuously variable valve timing are all part of the recipe, and each engine is paired with a six-speed automatic transmission with auto grade breaking. So far, no fuel economy or horsepower figures have been released, though GM says the new engines will best their predecessors in both areas.
Outside, the trucks feature a number of enhancements to reduce drag and wind noise, and GM claims both the Silverado and Sierra will offer buyers some of the quietest cabins in the class. Extended cab models now feature front-hinged rear doors to allow easier access to the back passenger area, and Crew Cab buyers can now select between a five-foot, eight-inch bed or a six-foot, six-inch bed. Buyers with a mind toward going off road will also rejoice in the return of the Z71 package, complete with Rancho shocks, front tow hooks and additional under-body protection.

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.

Here's how Detroit is selling more luxury vehicles than Germany and Japan

Now there's an attention-grabbing headline, eh? Although the answer to the riddle - pickup trucks and SUVs - might be somehow deflating, the numbers involved deserve a going over. According to TrueCar's figures (click on the table to enlarge), six of the year's ten best-selling vehicles in the US that sell for a transaction price above $50,000 are body-on-frame, and the Mercedes-Benz E-Class is the only foreigner to crack the top five. Every enthusiast knows that pickup trucks are 'Murica's most popular vehicle by a colossal margin, and there have been plenty of reports about the popularity of luxuriously appointed trucks and SUVs, but compare these figures from TrueCar: 70 percent of Chevrolet Tahoe sales have a transaction price above $50K, and The Bowtie is expected to make $3.9 billion in revenue on 66,945 predicted high-dollar sales; 95.1 percent of E-Class sales break $50K, so the German company will make $4.0 billion on 67,006 predicted sales in that pricing sphere. It's about the only time you'll see the Tahoe ranked right next to Mercedes' bread-and-butter sedan. Ram is ahead of those two with $4.2B coming from $50K-plus sales. The Ford F-Series does almost as much revenue as the next three combined, with an expected $10.8 billion coming from sales of trucks over $50K - more than a quarter of the model's total sales, when a base F-150 can be had for about $26,000. Yes, the Germans make a lot more money on fewer sales, but considering the comparison, the bottom line isn't too troubled by such facts. Weighing like-for-like, the full-size Ford walks it in every category; elsewhere, the Chevrolet Silverado outsells the Ram, but the Ram outsells the Chevy by 6.7 percent above $50K. And for all the flak GMC takes over swapping out grilles, the Sierra also outsells the Chevy in the well-appointed segment, 16.1 percent of sales versus 11 percent – the Professional Grade brand is a huge profit center for The General. You'll find more info in the TrueCar press release below. TrueCar finds pickup trucks far outsell premium brands among top 10 vehicles over $50,000 Ford F-Series pickup sales over $50,000 surpass combined BMW 3, 5, 7 Series luxury car sales SANTA MONICA, Calif. (December 10, 2014) - TrueCar, Inc., the negotiation-free car buying and selling platform, finds mainstream pickup trucks and sport-utility vehicles dominate U.S.