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GM will recall 3.5 million pickups and SUVs to fix brake issue

WASHINGTON — General Motors Co is recalling 3.46 million U.S. pickup trucks and SUVs to address a vacuum pump issue that could make braking more difficult and increase the risk of a crash. The recall, which covers 2014-2018 model year vehicles, including some Cadillac Escalade, Chevrolet Silverado, Chevrolet Tahoe, GMC Sierra, Chevrolet Suburban and GMC Yukon vehicles, 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 Wednesday. NHTSA opened a preliminary investigation into the issue in November 2018, and said it had reports of 9 crashes and two injuries related to the issue. It provided GM in July with additional field reports that prompted the automaker to open an investigation. The company did not immediately say on Wednesday how many injuries or crashes are linked to the issue but said it could impact braking in "rare circumstances." GM said dealers will reprogram the Electronic Brake Control Module with a new calibration that will 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. Recalls Chevrolet GM GMC

More than 5,500 people tried to get the 2016 Chevy COPO Camaro

It's stating the obvious, but the 2016 Chevy COPO Camaro is popular with enthusiasts. So much so, it's attracted more than 5,500 hand raisers, General Motors said Tuesday at an event to show off the company's new Performance and Racing Center in Pontiac, MI. Unfortunately for drag racing fans, Chevy will only sell 69 of them, as it has for the last four years. The COPO Camaro can be configured for the NHRA Stock and Super Stock classes. It comes with racing-tuned chassis pieces and a solid rear axle. Power choices include 5.7-, 6.2- and 7.0-liter V8 engines. About half of COPO Camaro owners race their cars, and the rest keep them as collectibles. Jim Campbell, GM vice president of Performance Vehicles and Motorsports, wouldn't say if the COPO is a profitable venture, but noted the fire-breathing dragster raises the image of Chevy and Camaro. "It makes sense for our business from a number of perspectives," he said. The first COPO Camaro, a Courtney Force-styled racecar that was revealed in November at the SEMA Show in Las Vegas, hammered for $300,000 at the Barrett-Jackson auction last month. The proceeds went to the United Way. Campbell said low COPO production keeps interest high. Enthusiasts can also build their own COPOs by buying a rolling chassis and a crate motor, though those are not viewed by collectors in the same manner as GM factory-built creations. The COPO Camaro's V8 is one of several competition engines designed, built, and validated at the GM Performance and Racing Center. The Corvette C7R's 5.5-liter V8 and the Cadillac ATSV.R's 3.6-liter twin-turbo V6 are two more. Chevy calibrates and conducts dynamometer testing on its 2.2-liter V6 for IndyCar and performs design work on its NASCAR V8 at the facility, which existed previously at another location in Michigan. Related Video:

2016 Chevrolet Malibu Hybrid Quick Spin [w/video]

If a Chevy Volt is like a hybrid that prefers its electric motor, then the new Malibu hybrid is like a Volt you never have to plug in. That's partly because you can't plug it in, but more because the Volt and the gas-electric Malibu share a lot of major components. Since we happen to like the newly refined Volt, that's good news for the larger family sedan. The shared parts include the blended braking system, A/C compressor, the auxiliary power module, and most of the hybrid transaxle (what you might call a fancy electro-transmission). In the Malibu, the electric motors use neodymium magnets for efficiency and power, while the Volt has weaker ferrite magnets to reduce drag, and the Volt also gets an extra clutch to lock out the engine. The two use different batteries, with their size, power capabilities, and chemistry suited to the task for each vehicle. Unlike most of the midsized sedan leaders, the Malibu has never had a full hybrid option. For a few years in the last generation, Chevy offered the Malibu Eco with a version of GM's eAssist mild-hybrid system, which featured a small motor-generator in place of an alternator hooked up to a bigger battery that could harvest energy during deceleration and add some back in when you hit the throttle; it also brought engine stop-start functionality to save a little more fuel. But it saved only a little fuel, so eAssist was nixed in favor of a more efficient four-cylinder with a standalone stop-start system. Driving Notes Mode switches between gas and electric are just as smooth as in the Volt. No shudder or weirdness in the throttle. It drives as much like a gas-only car as any midsized hybrid does. The blended braking system is also noticeably well sorted. There's no deadness in the pedal, no touchiness, and no artificial, wooden feeling when you step through the regen portion of its travel. There's nothing abrupt or jarring about any of the experience, and the Malibu's baked-in quietness helps to deal with noise from the somewhat coarse 1.8-liter gas engine. Engine startup and shutdown are noisy from outside, but much less noticeable from within. The 2016 Malibu is larger yet lighter. The hybrid weighs about 125 pounds more than a comparably equipped 1.5T. You don't notice the extra weight, but there is some space eaten out of the trunk by the battery.