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GM warning 800,000 owners that their cars may need oil changes more frequently than they say

The days of changing your engine oil every 3,000 miles are long gone thanks to most cars having automatic oil monitoring systems, but about 800,000 General Motors vehicles apparently have incorrect monitoring software that is leading to premature engine component wear. According to Autoweek, certain 2010-2012 Buick LaCrosse, Regal, Chevrolet Equinox and GMC Terrain models equipped with 2.4-liter four-cylinder engines could be going too long in between oil changes resulting in a higher-than-normal number of warranty claims for the engine's balance chain. The balance chain links the balance shaft to the crankshaft, and a worn one can produce higher noise levels.
As a fix, GM dealers will be reprogramming the software for the monitors in an effort to reduce the interval between oil changes, which varies based on driving habits and conditions. Through February 2015, the software update will be done at no cost to vehicle owners, but since this is not a recall, after that point, it will be up to the discretion of dealers as to whether or not they will charge for the service. What isn't immediately clear is whether GM plans on giving assistance to out-of-warranty customers who are experiencing engine issues from the worn chain.

GM and Isuzu to partner for medium-duty commercial truck

General Motors is returning to the medium-duty truck business in the US for the first time since 2009 thanks to a new deal with longtime-partner Isuzu. The arrangement brings the Isuzu N-series models to Chevrolet dealers with the Bowtie's branding on them in 2016. There are six medium-duty Chevy models arriving at dealers in regular cab and crew cab bodies: the 3500, 3500HD, 4500, 4500HD, 5500, and 5500HD. The trucks will be sold as a bare chassis for buyers to outfit to their needs. Depending on model, customers will have the choice of an Isuzu-sourced 3.0-liter and 5.2-liter diesel engines or a 6.0-liter V8 gasoline-fueled engine from GM and six-speed gearbox. According to company spokesperson Bob Wheeler to Autoblog, the diesel models will be built in Japan and the rest assembled from knockdown kits in Charlotte, MI. This kind of vehicle sharing isn't uncommon for GM in the commercial segment, and it already partners with Nissan to use the Japanese brand's NV200 as the City Express van. The General also once owned a significant stake in Isuzu, and the two have remained collaborators even since then. Isuzu and GM Enter Commercial Vehicle Collaboration Agreement in the U.S. 2015-06-15 DETROIT and FUJISAWA, Japan – General Motors Co. (NYSE: GM) and Isuzu Motors (TSE 7202) have reached an agreement on a U.S. commercial vehicle collaboration, allowing Isuzu to strengthen its product lineup and GM to expand its commercial vehicle portfolio. Isuzu will produce low cab forward models for GM, based off of the Isuzu N-Series. The vehicles will be distributed by participating Chevrolet dealers in the U.S. market starting in 2016. To strengthen the product lineup, GM and Isuzu will explore the use of GM commercial vehicle components for Isuzu low cab forward trucks and GM will continue to produce and supply the 6.0L V-8 gas engine and six-speed transmission for Isuzu gasoline-powered low cab forward trucks. Isuzu and GM have maintained a strategic partnership for more than 40 years, producing collaborative business opportunities throughout the world. This agreement continues that tradition and reinforces a long-term relationship that helps to explore future collaborations in the U.S. commercial vehicle business. About General Motors General Motors Co. (NYSE:GM, TSX: GMM) and its partners produce vehicles in 30 countries, and the company has leadership positions in the world's largest and fastest-growing automotive markets.

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.