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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.

GM reportedly developing 2.5-liter turbo four-cylinder

General Motors is allocating a massive amount of resources to developing electric technology, but it's not forgetting about the gasoline-powered cars that make up the bulk of its sales. It's reportedly designing a new 2.5-liter turbocharged four-cylinder engine based on its 2.7. Citing "sources familiar with the matter," enthusiast website GM Authority wrote that the 2.5-liter four is "in [the] final stages of development," meaning it should be announced sooner rather than later (assuming the report is accurate). Technical details are few and far between as of writing. The publication learned that the 2.5 will be part of the Cylinder Set Strategy (CSS) family of engines and that it will be mechanically related to the 2.7-liter currently found in the Chevrolet Silverado 1500, among several other models. It will feature dual overhead camshafts. It's too early to tell which models the 2.5-liter four-cylinder will end up in, or how much power it will generate. The output will likely depend on the application. For context, the 2.7 delivers 310 horsepower at 5,600 rpm and 348 pound-feet of torque between 1,500 and 4,000 rpm in the Silverado. In the smaller Colorado, it provides anywhere between 237 and 310 horsepower depending on the trim level selected. While this is pure speculation, our crystal ball tells us the engine will end up powering crossovers. It's an easy deduction to make. We can't imagine it will be offered in the Silverado, and seeing it in the Colorado is unlikely because its entry-level engine develops 237 horsepower; there's likely not much of a market for a midsize truck with 200 or so horsepower. Putting it in the Corvette wouldn't make sense and the Camaro has nearly reached the end of its life cycle without a successor planned. This leaves us with Chevrolet's range of crossovers, like the Equinox, as well as their GMC-, Buick-, and Cadillac-branded counterparts. We're not discounting the possibility that the cars set to receive the 2.5 haven't been unveiled, but those are likely crossovers, too; the odds of seeing another big Chevy sedan are very, very low. General Motors hasn't commented on the report, and it hasn't publicly announced plans to expand its CSS family of engines. If the report is accurate, we should learn more about the new turbocharged, 2.5-liter four-cylinder engine in the not-too-distant future. Featured Gallery 2022 Chevrolet Equinox RS View 56 Photos Buick Chevrolet GM GMC

NHTSA probes 2010 Chevy Tahoe for side airbag issue

After a person was killed in a rollover accident in a 2010 Chevrolet Tahoe in Texas in 2011, the National Highway Traffic Safety Administration is considering whether to conduct a deeper investigation into a potential problem with the model's side airbags. According to the petition filed with the government agency, the SUV's rollover side curtain airbag deployed in the accident, but the design allegedly still allowed some of the occupants in the second- and third-row seats to be ejected from the vehicle. One of them died in the crash. Based on NHTSA's preliminary review, this is the only report of this type of incident happening in a 2007-2015 Tahoe or GMC Yukon. "GM investigated the complaint that is the basis of the petition and found no defect trend," company spokesperson Alan Adler said to The Detroit News, and said the automaker will cooperate with the feds. Still, "a defect petition has been opened to evaluate the issue and make a grant or deny decision," according to NHTSA. Depending on the agency's findings, this could lead to a full investigation and possible recall affecting an estimated 58,000 vehicles. INVESTIGATION Subject : Rollover Side Curtain Air Bags Date Investigation Opened: JUN 11, 2015 Date Investigation Closed: Open NHTSA Action Number: DP15004 Component(s): AIR BAGS All Products Associated with this Investigation Vehicle MakeModelModel Year(s) CHEVROLET TAHOE 2010 CHEVROLET TAHOE HYBRID 2010 Details Manufacturer: General Motors LLC SUMMARY: The Office of Defects Investigation (ODI) has received a petition requesting an investigation of alleged defects that can cause occupant ejections during rollover crashes in certain General Motors vehicles. The petition alleges the defects allow second and third row occupants to be ejected despite the deployment of rollover side curtain air bags. The petition cites a 2011 Texas crash involving a model year 2010 Chevrolet Tahoe, which allegedly resulted in multiple occupants to be ejected. One of the ejected occupants was fatally injured. ODI's preliminary review of its consumer complaint data found no similar reports of occupant ejections on 2007-2015 Chevrolet Tahoe and GMC Yukon vehicles. ODI also reviewed Early Warning Reporting data submitted by General Motors. A defect petition has been opened to evaluate the issue and make a grant or deny decision.