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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.

2016 GMC Terrain Denali Quick Spin

Here's a bewildering statistic – General Motors sold over 347,000 GMC Terrain and Chevrolet Equinox crossovers in 2014, making the Theta platform twins the best selling vehicles in their segment. GM sold more Equinox/Terrain crossovers than Honda did CR-Vs, Ford did Escapes, and Toyota did RAV4s. After a week behind the wheel of the 2016 Terrain Denali, we can't fathom why GMC's entry, which accounts for nearly a full third of GM's annual small CUV sales, has been so popular. An inefficient engine, cheap interior plastics, uncomfortable seats, a shortage of technology, and a high price left us questioning why anyone would order this Denali over a Titanium-trim Ford Escape, a Jeep Cherokee Limited, or a Hyundai Santa Fe Sport with the Unlimited Package. Driving Notes While looks are subjective, we'd posit that GMC didn't go far enough with its 2016 mid-cycle refresh. New accents on the front bumper, a tweaked grille surround, and LED running lights round out the changes up front, while the rear gets a slightly different bumper. GMC claims there's a new hood, although we challenge you to pick out the differences – here are the official galleries for the 2013 and 2016, if you'd like to try. GMC missed a tremendous opportunity here. New headlights, some restyled taillights, and tweaked mirrors would have given the impression of a more significant refresh. As it stands, these changes don't add up to much. GMC also claims it made changes in the cabin, adding a "revised instrument panel center stack." Aside from the missing CD slot, which has been replaced with an oddly shaped and not terribly useful shelf, it's hard to spot much of a difference. The Terrain Denali's cabin materials feel cheap. You'll be spending at least $35,000 to park one of these in your driveway, but aside from the leather-and-faux-wood steering wheel, no material feels worthy of that price tag inside. The lower dash plastics are hard and scratchy, the center stack feels hollow and creaks when pressed on, and the too-small shade over the seven-inch display feels flimsy. The upper dash is covered in a cheap-feeling, leather-like material that looks unchanged from when the Terrain Denali debuted back in model year 2013. These materials don't make sense in a vehicle that, as tested, exceeded $41,000. The most egregious thing about the refreshed Terrain is the lack of content.

GM trucks get hybrid versions, but you'll probably never see one

A few years ago, General Motors sold hybrid versions of its Chevy Silverado and GMC Sierra pickups. They weren't very good, using GM's old two-mode hybrid system that resulted in only negligible fuel economy gains. But GM's trying again, launching eAssist models of the 2016 Silverado and Sierra that are said to offer 2-mpg improvements in city, highway, and combined fuel economy ratings. Problem is, you probably won't be able to get one. Only 700 eAssist trucks will be made for the 2016 model year – 500 Silverados and 200 Sierras. When you consider that GM moved 824,683 examples of its light-duty pickups in 2015, this small run represents 0.08-percent of all Silverado/Sierra production, and GM says it "will monitor the market closely ... and adjust as appropriate moving forward." But that's not the only limitation. The eAssist trucks will only be sold through California dealers. For the Silverado, eAssist can only be optioned on the 1500 Crew Cab 1LT 2WD model, and for the Sierra, the fuel-saving technology is solely available on the 1500 SLT Crew Cab 2WD model with the SLT Premium Plus package. Granted, in terms of the Sierra, that means you get niceties like LED headlights and taillights, Apple CarPlay and Android Auto, Bose premium audio, heated seats and steering wheel, lane keep assist, and more. In the trucks, eAssist combines a small electric motor and 0.45-kWh battery pack with the pickups' 5.3-liter V8. GM estimates total output of 355 horsepower and 383 pound-feet of torque – no more horsepower than the non-eAssist trucks, but three more pound-feet of torque. GM says the eAssist trucks can tow up to 9,400 pounds, and the battery only adds 100 pounds to the trucks' weight. The electric motor provides 13 hp and 44 lb-ft of torque for a boost of acceleration off the line, or during passing. It also allows the engine to run in four-cylinder mode for longer periods of time. eAssist uses regenerative braking to help power onboard electrical systems, and adds start/stop to the powertrain. Finally, the so-equipped trucks have a six-percent improvement in aerodynamics, thanks to a soft tonneau cover and active grille shutters in the front fascia. Great news is, the eAssist option is relatively inexpensive, only costing $500. But good luck getting your hands on one.