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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.

2014 Chevrolet Silverado and GMC Sierra show all their sides in Detroit

There could hardly be more riding on the next-generation General Motors full-size pickup trucks, so the automaker has wisely made sure to have a selection of different models on hand at the Detroit Auto Show to show off. The 2014 Chevrolet Silverado and 2014 GMC Sierra were both officially introduced last month at a stand-alone reveal, and now they'll be on display for the public to see in various body configurations and trim levels.
The Silverado LTZ Crew Cab and Sierra SLE Extended Cab are aimed at providing more of a high-end pickup experience, while the Silverado LT Z71 Extended Cab and Sierra SLT Z71 Crew Cab should have off-road fans scouting out their favorite trails. The crew cab trucks won't go into production until sometime during the second quarter of this year - with other bodystyles coming later in the year - but we have plenty of live images from Detroit for you to enjoy.

Brief website update hints 2016 Chevy Volt will get 43 mpg, 106 MPGe

Customers in California can already order the 2016 Chevrolet Volt and be the first to own the new, range-extended EV in August. It appears there's now a possibility that buyers of the updated model might get slightly better economy than Chevy's initial announcement from the 2015 Detroit Auto Show in January, too. According to the eagle-eyed folks at GM-Volt.com, Chevy has been subtly tweaking the spec page for the 2016 Volt. It briefly showed the model getting 43 miles per gallon combined fuel economy and 106 mpge, rather than the originally released figures of 41 mpg and 102 mpge. Shortly afterward, the internal-combustion mileage returned to 41 mpg, but 106 mpge remained. A GM spokesperson told Hybrid Cars the changes happened by mistake. "We have not finalized numbers yet. We expect to announce in July." The economy isn't the only statistic to see an adjustment, though. The total range was reportedly briefly shown as 420 miles, and then returned to a 430-mile rating, according to Hybrid Cars. The Volt's output has also been slightly tweaked from the original figures. It's now displayed as 150 horsepower and 293 pound-feet of torque, versus the preliminary numbers of 149 hp and 294 lb-ft. These tiny changes likely have a negligible impact on real-world driving, but they suggest that Chevy's team is still working to squeeze as much as possible from the latest Volt's powertrain. If the final figures are coming in July, then the engineers still have just a few weeks to improve the ratings even more.