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GM recalls 3.8 million vehicles in North America due to braking issue

WASHINGTON — General Motors Co said Wednesday it was recalling 3.46 million U.S. pickup trucks and SUVs to address a vacuum pump issue that could make braking more difficult and that has been linked to 113 accidents and 13 injuries. The recall covers 2014-2018 model year vehicles, including some Cadillac Escalade, Chevrolet Silverado, Chevrolet Tahoe, GMC Sierra, Chevrolet Suburban and GMC Yukon vehicles. In late June, GM recalled 310,000 vehicles in Canada for the same issue. GM did not immediately explain why the Canadian recall occurred more than two months before it called back the vehicles in the United States. The recall was triggered because the amount of vacuum created by the vacuum pump may decrease over time, GM told the National Highway Traffic Safety Administration (NHTSA) in documents posted on Wednesday. The NHTSA opened a preliminary investigation into the issue last November, and said it had reports of nine related crashes and two injuries. It provided GM in July with additional field reports that prompted the automaker to open an investigation. GM said it could affect braking in "rare circumstances." The NHTSA said in a statement the "vehicles may experience brake boost failure, which would require increased brake pedal effort, leading to a hard brake pedal feel, and potentially increased stopping distance." GM said dealers will reprogram the electronic brake control module to improve how the system utilizes the hydraulic brake boost assist function when vacuum assist is depleted. GM said the vacuum assist pump, which is lubricated with engine oil that flows into the pump through a filter screen, can in some cases lose effectiveness over time, as debris such as oil sludge can accumulate on the filter screen. GM told NHTSA that prior model years used a different brake assist system design, and vehicles manufactured after 2018 were not equipped with the affected pump design. Separately, GM said on Wednesday it is recalling 270,000 additional U.S. vehicles in three smaller recalls, including 177,000 2018 Chevrolet Malibu cars with 1.5L turbo engines because an error in the engine control module software may result in the fuel injectors being disabled.

2016 Chevy Volt arrives with 50-mile EV range, 41 mpg [w/ video]

Let's start with the numbers. The 2016 Chevy Volt will have an all-electric range of 50 miles from a new, 18.4-kWh lithium battery. It will get 41 miles per gallon (combined) once the battery runs dry and have 102 MPGe. Oh, and it has five seats, sort of. To compare, today's four-seat 2015 Volt has a 38-mile range from a 17.1-kWh battery in a powertrain that offers 37 mpg and 98 MPGe. So, across the board, there are notable improvements. Now that that's out of the way, let's talk story. General Motors will unveil the new Volt at the Detroit Auto Show later today, but it's been talking about how this new version – the first major plug-in hybrid vehicle to get a serious redo in the modern era – was crafted with reams and reams of data from first-gen Volt customers. At a preview event for journalists last week, GM executive chief engineer Pam Fletcher told Autoblog that these owners "gave us the recipe" to make the second-gen model. At the top of the request list was more range (check), more "fun-to-drive" behavior (check?) and a smoother and quieter experience (we'll assume a check here, given that the new 1.5-liter four-cylinder – the first North American application of this new engine family – should offer more power with less noise than the previous 1.4-liter, four-cylinder powerplant). Other customer-driven changes in the new Volt include a different place to store the charging cable (in the side of the trunk instead of under the load floor) and a new brake system with improved blended regenerative braking feel as well as driver-selectable regen levels. The requested 50-mile range comes from a new, lighter battery that has increased capacity from fewer cells (192 vs. 288) and a simplified control architecture. Along with the new battery, the electric drive unit is a two-motor deal that is up to 12 percent more efficient and 100 pounds lighter, while also being "tremendously smaller," notes Fletcher. It offers 294 pound-feet of torque and a maximum 149 horsepower of "motoring power" delivered to the wheels. GM says it has worked hard to reduced the amount of rare earth materials in these motors, and one of them doesn't use any at all. The new powertrain offers improved acceleration times, as well. The 2016 Volt can go from 0 to 60 miles per hour in 8.4 seconds, a seven-percent improvement, while the 0-30 mph time has been improved by 19 percent, down to 2.6 seconds. The new Volt is more conventional looking, but certainly not completely ordinary.

Chevy Colorado Z71 Trail Boss 3.0 concept heads to SEMA

Chevrolet is presenting a new take on the Colorado pickup at the SEMA show this year. The show truck picks up where the Colorado Z71 Trail Boss Edition leaves off, with numerous accessories from the parts catalog as well as several custom additions. The SEMA truck is based on a Crew Cab model with four-wheel drive, painted red with rally stripes. Among the features added from the catalog are a sport bar with LED auxiliary lighting, mounted to the cargo bed. It's also stylistically augmented with fender blares, Bowtie emblems, and rocker steps all done up in black to match the 17-inch alloys shod with Goodyear DuraTrac all-terrain tires. Chevy has also equipped this truck with an automatic locking rear diff, a transfer case shield, recovery hooks at the front, a spray-in bedliner, projector-beam headlamps, fog lamps, and all-weather floor mats. Chevy has also fitted this pickup with color-keyed door handles and mirror caps, upgraded exhaust and air intake, rubber floor liners, brushed metal interior trim, and an illuminated grille badge. Public reception will determine how many of these and other additional features will be considered for production. Colorado Z71 Trail Boss 3.0 Concept Shows Off-Road Style New styling accessories, performance parts enhance trail-ready capability LAS VEGAS – The Colorado Z71 Trail Boss Edition is designed for those who want to blaze their own trails and Chevrolet's new Z71 Trail Boss 3.0 concept vehicle enhances its off-road style with new Chevrolet accessories and performance parts. Chevrolet introduced the new concept vehicle at the SEMA Show today, where it joined concept versions of the Silverado 1500 and HD models to demonstrate the depth and breadth of the brand's three-truck lineup. "The Colorado Z71 Trail Boss Edition is made for tackling the tough terrain required to get away from it all and this concept version does it with rugged style," said Sandor Piszar, director of Chevrolet Truck Marketing. "And whether it's the Colorado, Silverado 1500 or Silverado HD, there's a Chevy truck to take you where you want to go, regardless of whether there's a road leading there." The production 2016 Colorado Z71 Trail Boss is offered in extended and crew cab configurations, with a choice of a long or short cargo bed and available 4WD – as well as the all-new 2.8L Duramax turbo-diesel, which takes the maximum trailering rating up to 7,700 pounds.