2015 Gmc Sierra 2500 Denali on 2040-cars

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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.

GMC reveals updated 2016 Sierra

It was just the other day that Chevy revealed the face of the new 2016 Silverado. And as might have been expected, sister brand GMC has followed up by unveiling its version in the facelifted 2016 Sierra pickup – just two and a half years since the current all-new model was rolled out. Though details released thus far remain few and far between, GMC has revealed more images of the new Sierra – in SLT, Denali and All Terrain trim levels – than Chevy did of the updated Silverado. It's got new headlights, fog lamps, and C-shaped daytime running lights and taillights, all using LED elements. It's arguably a more muscular look than the Chevy version, and with more chrome than the toned-down Silverado. That is, at least, in SLT and Denali trims. The All Terrain version looks more in line with the similarly off-road-focused Silverado Z71 and its color-keyed treatment. The changes ought to help GMC keep up the momentum that has seen its sales rise year-over-year every month over the past twelve. The interior shots indicate that the new Sierra will incorporate Apple CarPlay like GM is installing in so many models across its various brand ranges. But we'll have to wait a little while longer for all the details. Related Video: 2016 GMC Sierra Unveiled 2015-07-15 DETROIT -- GMC's best-selling truck has great momentum coming off its best June since 2006 and 12 consecutive months of year-over-year sales gains. With exterior styling as its top reason for purchase, the new truck adds key design elements: LED "C-shaped" signature daytime running lights and LED headlights; new front fascia and grilles for each trim level; new LED fog lamps; new bumpers; and new "C-shaped" LED taillights. The new Sierra will be available in the fourth quarter of this year, with additional details and information on the new model released in the coming months.

IIHS: High numbers of drivers treat partially automated cars as fully self-driving

WASHINGTON — Drivers using advanced driver assistance systems like Tesla Autopilot or General Motors Super Cruise often treat their vehicles as fully self-driving despite warnings, a new study has found. The Insurance Institute for Highway Safety (IIHS), an industry funded group that prods automakers to make safer vehicles, said on Tuesday a survey found regular users of Super Cruise, Nissan/Infiniti ProPILOT Assist and Tesla Autopilot "said they were more likely to perform non-driving-related activities like eating or texting while using their partial automation systems than while driving unassisted." The IIHS study of 600 active users found 53% of Super Cruise, 42% of Autopilot and 12% of ProPILOT Assist owners "said that they were comfortable treating their vehicles as fully self-driving." About 40% of users of Autopilot and Super Cruise — two systems with lockout features for failing to pay attention — reported systems had at some point switched off while they were driving and would not reactivate. "The big-picture message here is that the early adopters of these systems still have a poor understanding of the technologyÂ’s limits," said IIHS President David Harkey. The study comes as the National Highway Traffic Safety Administration (NHTSA) is scrutinizing Autopilot crashes. Since 2016, the NHTSA has opened 37 special investigations involving 18 deaths in crashes involving Tesla vehicles and where systems like Autopilot were suspected of use. Tesla did not respond to requests for comment. Tesla says Autopilot does not make vehicles autonomous and is intended for use with a fully attentive driver who is prepared to take over. GM, which in August said owners could use Super Cruise on 400,000 miles (643,740 km) of North American roads and plans to offer Super Cruise on 22 models by the end of 2023, did not immediately comment. IIHS said advertisements for Super Cruise focus on hands-free capabilities while Autopilot evokes the name used in passenger airplanes and "implies TeslaÂ’s system is more capable than it really is." IIHS in contrast noted ProPILOT Assist "suggests that itÂ’s an assistance feature, rather than a replacement for the driver." NHTSA and automakers say none of the systems make vehicles autonomous. Nissan said its name "is clearly communicating ProPILOT Assist as a system to aid the driver, and it requires hands-on operation.