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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.

Hotter Cadillac CT5-V and CT4-V spy photos, video hint at engines

Cadillac has some extra spicy V cars on the way, and this latest batch of spy photos and videos is more revealing than anything we’ve seen yet. We donÂ’t yet know the final name of these Cadillac V cars, but they are supposed to be the true replacements for the CTS-V and ATS-V. The CT4-V and CT5-V we saw previously are only mild performance variants of the regular sedans. Diving into the video seems more important than the photos on this one. Our spy shooters managed to capture great audio that allows us to take some guesses at whatÂ’s under the hood of these cars. The CT5-Vs in black and white camouflage sound like they have some gnarly V8s under their skin. We canÂ’t pick up a supercharger whine or a turbocharger whistling away, but weÂ’re not going to rule out the former. The CTS-V has a 6.2-liter supercharged V8 that makes 640 horsepower, and it wouldnÂ’t be out of the question to see this car rival it in power. We still havenÂ’t heard the CT6-V at full song, but the engine weÂ’re listening to here just doesnÂ’t strike us as the sound of a 4.2-liter twin-turbo V8 in that car. It sounds a lot more guttural, like the LT4 or LT5 V8 engines. Also, none of the CT5-Vs here sounded like they had manual transmissions. CT4-V spied View 40 Photos Moving to the CT4-V in the blue getup, it sounds a lot like a V6 is under the hood. This also makes sense when we consider that the ATS-V had a 3.6-liter twin-turbo V6 itself. Most important of all to note, is the evidence of a manual transmission. In one of the acceleration clips, weÂ’re able to hear the tell-tale sound of a driver pausing in acceleration for a split second to change gears. This is great news, folks. The manual is looking alive and well in the Cadillac sedan to us. Another clip of a CT4-V in black and white camouflage makes it sound like that particular model is equipped with an automatic transmission, indicating that Cadillac may be offering both transmission options on the new car. As for the rest of the photos, go ahead and take in all the close-up details. We got photos of the tires on the CT4-V, showing 255/35/ZR18s up front and 275/35/ZR18s in back. Michelin Pilot Sport 4 S rubber is used, telling us this thing is going to have a ton of grip. There are more vents, wider fenders and more aggressive styling throughout on these cars compared to the lower-performance V cars. Now that weÂ’re looking at them from much closer than before, the package is looking even more comprehensive.

Cadillac's Blackwing V8 was the best engine at the worst time

It should be clear that GM knows how to innovate and engineer excellent products when it wants to. Cadillac's 4.2-liter twin-turbo Blackwing V8 is recent proof of that. Yet, as related in an extensive Road & Track piece, the Blackwing became victim to some of The General's bugbears, like the reticence to — for whatever reasons — unleash its excellence everywhere, fund that excellence, and be consistent with that excellence over the long term beyond the Corvette and full-sized pickups and SUVs. The R/T story relates tales told by "several people deeply involved with the Blackwing project" about how an engine 18 years in the making was deprived of its reasons for being in less than three. Starting around 2000, GM spent a dozen years building Cadillac up to the point where the American luxury brand could rationally flip to the chapter called, "Taking the Fight to the Germans, but for Real this Time." The first steps in the plan meant an exclusive platform and an exclusive engine. The platform was called Omega. You know the engine's name. They were going to be the aluminum-blocked fist and velvet glove enabling Cadillac to break on through to the other side of luxury — proper luxury to global standards, that is — with a range of beautiful and dynamic crossovers and sedans. An engineer involved in the project estimates GM poured $16 million into the Blackwing's clean-sheet development. Many more seven-figure sums went into creating the first sedan on the Omega platform, the CT6. The automaker dropped millions again poaching ex-Audi and Infiniti chief Johan de Nysschen, and moving Cadillac's headquarters to New York City in 2014. Further pallets of cash funded the development and debut of the Escala concept at Pebble Beach in 2016. In 2018, GM revealed its dramatically named DOHC twin-turbo V8. Considering what came before, the Blackwing clearly wasn't designed for cars. It was designed for world domination. However, against the backdrop of plummeting sedan sales, the CT6 didn't sell like GM had hoped. The automaker hesitated to marshal another fleet of Brinks trucks to fund entries into a cratering bodystyle. Removing sedans from the world domination equation created more difficult math for the crossovers and the Escala.