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GM applies for LT5, LTX trademarks... are new small block variants coming?

Recently discovered General Motors trademark applications for LT4, LT5, LT88 and LTX have observers wondering what kind of high-performance offerings could be on their way. A new LT4 would mark a return of the engine designation first used on the Corvette Grand Sport, SLP Pontiac Firehawk and SLP Chevrolet Camaro SS from 1996 and 1997. Supposition at Corvette Forum - which provided advance intel on the C7 like these leaked images - believes a new LT4 could go into the high-performance trim of the next-gen, 2015 Camaro that would be more powerful than the 580-horsepower Camaro ZL1.
Seeing an LT5 again would also be déjà vu - in its former life it was a 5.7-liter V8 for the C4 Corvette ZR-1 from 1990-1994 designed by Lotus, producing from 370 hp to 405 hp. A mix of rumor and hope is that the new LT5 will be a supercharged evolution of the 6.2-liter LT1 (pictured) placed in the new C7 Corvette, and that it will go into the C7 version of the ZR1 pumping out something like 700 hp.
The LTX trademark is, as with that last letter, a complete mystery. If the "X" isn't a generic way to denote the whole LT family, it's wondered if it LTX could refer to a crate motor offering like the LSX.

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.

GM recalling 316k vehicles due to headlamp faults

General Motors has announced a recall covering 316,357 vehicles globally, due to the possibility of sporadic or permanent failure of the low-beam headlamps. 273,182 of these vehicles are in the United States, while the remaining affected units are in Canada, Mexico, and elsewhere. This recall includes the 2006-09 Buick LaCrosse (pictured above), 2006-07 Chevy TrailBlazer and TrailBlazer EXT, 2006-07 GMC Envoy and 2006 GMC Envoy XL, 2006-07 Buick Rainier, 2006-08 Saab 9-7X, and 2006-08 Isuzu Ascender. In an email sent to Autoblog, General Motors explains that if the headlamp driver modules are not functioning correctly, "the low-beam headlamps and daytime running lamps could intermittently or permanently fail to illuminate." GM states that this problem does not affect things like high-beams, turn signals, marker lamps, or foglamps. As of this writing, GM states it "has not been able to confirm whether the HDMs in these vehicles caused any vehicle accidents." The National Highway Traffic Safety Administration has been notified, but the recall has not yet posted to the government agency's website. Scroll down to read the full details in GM's email. General Motors is recalling 273,182 Buick LaCrosse sedans and Chevrolet, GMC, Buick, Saab and Isuzu midsize SUVs in the U.S. for possible intermittent or permanent loss of low beam headlamps. Affected models are: 2006-2009 Buick LaCrosse sedans; 2006-2007 Chevrolet TrailBlazer and 2006 TrailBlazer EXT; 2006-2007 GMC Envoy and 2006 Envoy XL; 2006-2007 Buick Rainier; 2006-2008 Saab 9-7X and 2006-2008 Isuzu Ascender midsize SUVs. If the headlamp driver modules is not operating correctly, the low-beam headlamps and daytime running lamps could intermittently or permanently fail to illuminate. This condition does not affect the high-beam headlamps, marker lamps, turn signals, or fog lamps. GM has not been able to confirm whether the HDMs in these vehicles caused any vehicle accidents. The total population, including the U.S., Canada, Mexico and exports from North America is 316,357. The NHTSA was sent the Part 573 information for this recall on November 25. It has not yet posted to the NHTSA website. Featured Gallery 2008 Buick LaCrosse CXS News Source: General Motors Recalls Buick Chevrolet GM GMC Isuzu Saab SUV Sedan chevy trailblazer buick rainier isuzu ascender