1989 Chevrolet Corvette Base Hatchback 2-door 5.7l 6-speed Z-51 Fx3 on 2040-cars

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GM Recalling Another 2.7 Million Vehicles In Five Separate Campaigns

The recalls keep rolling in from General Motors, evidently keen to avoid repeating the mistakes of the ignition-switch debacle and clean house. This time they're all coming at once, with five separate recalls announced together covering approximately 2.7 million vehicles. The largest of the five actions involves over 2.4 million units of the previous-generation Chevrolet Malibu and Malibu Maxx, Pontiac G6 and Saturn Aura in order to fix brake light wiring harness, which have been found to be susceptible to corrosion. The recall is separate from the 56k Aura sedans which GM recently recalled over faulty shift cables, not to mention the previous massive recall of 1.3 million vehicles – some of them the same models – but appears to have resulted from the National Highway Traffic Safety Administration investigation that started with the G6 almost a year ago. The second-largest campaign involves the 2014 Chevy Malibu, specifically those fitted with GM's 2.5-liter engine and stop/start system, approximately 140,000 examples of which has been found to have problematic brakes. The issue does not appear to be connected to the recall of 8k Malibu and Buick LaCrosse sedans (also involving brake woes) which we reported upon last week. Four crashes have been reported in such models, but GM admits it's not yet clear if the problem was a contributing factor in the accidents. A further 112k Corvette models from the 2005-2007 model years are being called in for problems with their low-beam headlamps resulting from a flexing relay control circuit wire that's not meant to bend. GM says it is "aware of several hundred complaints" about this issue, but notes that there have been no reports of related accidents. In addition, over 19k examples of Cadillac CTS from the 2013 and 2014 model years are being recalled over windshield wipers that might not work after a jump start. Finally, GM is also bringing in 477 examples of its 2014 Chevy Silverado, Tahoe and GMC Sierra (though not the Yukon) to fix a problem with a tie rod in its steering rack. As ever, all recall repairs will be performed free of charge, and GM is now estimating that recall-related actions this quarter will result in an estimated $200-million charge against its second-quarter earnings. Read the full announcement from GM below for further details.

Chevrolet will preview electrified Silverado-like truck at CES 2021

After abandoning its fight against California's lawmakers, General Motors is shifting its electrification offensive into high gear. CEO Mary Barra will give the opening keynote address at the 2021 Consumer Electronics Show (CES), which will be held online, and Chevrolet will provide a peek at its electrified pickup during the event. Insiders familiar with the carmaker's plans told Bloomberg that Barra's address will highlight ways that electrification can improve the environment and society in general. General Motors president Mark Reuss will speak, too, and his remarks will be followed by a video that will highlight several future products, including what the sources referred to as "a plug-in Chevrolet pickup, some Cadillac models, and vehicles for other brands." These comments ask more questions than they answer, because plug-in means many things in this context. Chevrolet's electric Bolt is a plug-in vehicle, as is the upcoming GMC Hummer, but the plug-in hybrid Jeep Wrangler 4xe is one, too, and it's clearly not all-electric. It's often been assumed that Chevrolet's upcoming electrified truck will be electric, but it might arrive with a hybrid powertrain or a gasoline-powered range extender. Chevrolet could also follow Ford's lead and plant a stake in both the hybrid and the electric pickup segments. It's too early to tell if Chevrolet will unveil the same truck it previewed during a presentation earlier in 2020. Shown briefly, it wore a highly futuristic design that gave it a sleeker look than the current-generation Silverado. Cadillac's presentation promises to be interesting, because the company hinted it might abandon gasoline entirely by 2025, several years earlier than expected, even though its dealers aren't all on board with the shift. Going electric-only in about four years would force the brand to conduct a massive overhaul of its range. As of writing, there is not a single electric Cadillac in showrooms, but the Lyriq will arrive in late 2022 as a 2023 model. It's difficult to tell what's in store for other brands, but there are several cars that General Motors could show during CES. Buick doesn't sell an electric car in the United States yet, for example. Alternatively, GMC is working on an SUV variant of the Hummer, and it has started developing an electric truck. Going back to Chevrolet, our crystal ball tells us we'll see more of the 2022 Bolt EUV during the next edition of the tech show, too.

Is the skill of rev matching being lost to computers?

If the ability to drive a vehicle equipped with a manual gearbox is becoming a lost art, then the skill of being able to match revs on downshifts is the stuff they would teach at the automotive equivalent of the Shaolin Temple. The usefulness of rev matching in street driving is limited most of the time – aside from sounding cool and impressing your friends. But out on a race track or the occasional fast, windy road, its benefits are abundantly clear. While in motion, the engine speed and wheel speed of a vehicle with a manual transmission are kept in sync when the clutch is engaged (i.e. when the clutch pedal is not being pressed down). However, when changing gear, that mechanical link is severed briefly, and the synchronization between the motor and wheels is broken. When upshifting during acceleration, this isn't much of an issue, as there's typically not a huge disparity between engine speed and wheel speed as a car accelerates. Rev-matching downshifts is the stuff they would teach at the automotive equivalent of the Shaolin Temple. But when slowing down and downshifting – as you might do when approaching a corner at a high rate of speed – that gap of time caused by the disengagement of the clutch from the engine causes the revs to drop. Without bringing up the revs somehow to help the engine speed match the wheel speed in the gear you're about to use, you'll typically get a sudden jolt when re-engaging the clutch as physics brings everything back into sync. That jolt can be a big problem when you're moving along swiftly, causing instability or even a loss of traction, particularly in rear-wheel-drive cars. So the point of rev matching is to blip the throttle simultaneously as you downshift gears in order to bring the engine speed to a closer match with the wheel speed before you re-engage the clutch in that lower gear, in turn providing a much smoother downshift. When braking is thrown in, you get heel-toe downshifting, which involves some dexterity to use all three pedals at the same time with just two feet – clutch in, slow the car while revving, clutch out. However, even if you're aware of heel-toe technique and the basic elements of how to perform a rev match, perfecting it to the point of making it useful can be difficult.