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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.

Fullsize GM SUVs have a problem that's making owners sick

Some fullsize SUV owners are getting sick, thanks to a buffeting and vibration problem in 2015 model year examples of the Chevy Tahoe and Suburban, Cadillac Escalade, and GMC Yukon. According to owners' complaints to the National Highway Traffic Safety Administration, the issue can vary from an annoying vibration inside the cabin to an experience so severe that it leads to dizziness and headaches. General Motors is aware of the complaints, but the fix isn't so simple. According to spokesperson Tom Wilkinson to Autoblog, the company "has been tracking this issue for a while." The problem has a fairly low incidence rate, but when it does occur the issue can be "uncomfortable and annoying for owners." There's no precise cause for the issue, Wilkinson claims, and in some cases, simply balancing the tires or changing the door seals can make it go away. However, not all of the fixes are so simple. AutoGuide dug deep into the problem and discovered a GM preliminary information bulletin that advised dealers to remove the headliner and to check the roof's bonds to the bows that go across the vehicle. However, that document included a note that the solution might not entirely eliminate things. According to AutoGuide, adding Dynamat insulation to the roof sometimes helped the problem. A GM spokesperson also told AutoGuide the company fixed the problem at the end of the 2015 model year, and didn't go into any more detail. This roof issue seems linked to some of the worst droning in these SUVs. According to one complaint from a 2015 Suburban owner to NHTSA: "Roof will not remain attached to the roof bows. This causes the buffeting similar to a window being down when all are up. The results span from annoying to painful." A 2015 Yukon owner claims to have another alleged cause for the problem in a NHTSA complaint from February 2015. This person brought their SUV to the dealer seven times over the course of four weeks for vibrations. The dealer replaced the driveshaft, suspension components, and more, but nothing worked. According to an engineer to the service adviser: "In an effort to prevent roll overs, they designed the frame and body mounts too stiff. There are 40 engineers working on issues, they have no solutions that work across the board." Wilkinson told Autoblog that GM is working with customers on an individual basis to rectify things. Since these are newer vehicles, dealers should also fix the problem under warranty.

Next-gen GMC Canyon spied with big screen and heavy camo

The next generation of midsize GM pickups is well on its way to being ready, and these new spy shots give us an early look at the new interior inside the GMC Canyon. To our delight, the new Canyon interior doesn’t even remotely resemble the current truck. The relationship between the refreshed SierraÂ’s new interior and what we can see in these Canyon spy shots is impossible to ignore. While itÂ’s not an exact replica of, or a shrunken version of, the CanyonÂ’s screen hardware looks similar to the SierraÂ’s. We can see the volume knob sprouting out of the top left corner, and the whole screen is surrounded by shiny black plastic. The software itÂ’s running is GMÂ’s new Android Automotive-based infotainment that weÂ’ve already sampled in the 2022 Yukon. Just like in that vehicle, we can see that Google Maps is the native navigation system, and it features similar shortcuts on the left-hand side of the screen. Below the screen, the next-gen Canyon features all of its climate controls. The model weÂ’re looking at here must be an upmarket trim, because itÂ’s featuring heated and cooled seats. Another indication that this model could be a Denali (or other higher trim) is the small piece of wood trim on the door that is mostly shrouded by camouflage. We canÂ’t make it out all that well, but any amount of wood trim in a midsize pickup means luxury.  ItÂ’s difficult to make out whatÂ’s going on with the steering wheel, though we can see what appear to be silver switches flanked by flat black buttons. The instrument cluster is similarly difficult to see, but if the little glimpse of a “125 miles to empty” readout is any indication, it could very well be a totally digital cluster. WeÂ’ll need to wait to fully confirm that thought, though. When it comes to the exterior, there isnÂ’t a whole lot to see under the heavy camouflage. We have a reasonable look at the grille behind the mesh, and the front LED lighting signature is partially visible, too. WeÂ’ll note that there isnÂ’t much of a front bumper on this test truck, which is giving it the appearance of being an off-road capable pickup — itÂ’s just nowhere near as extreme as the Canyon prototype we spied last year sporting a ZR2-style suspension.  Big wheels fitted to this tester gives more credence to it possibly being a Denali. The rear is perhaps even more covered up than the front, making it even more difficult to see what GM is hiding.