2011 Gmc Acadia Denali on 2040-cars

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GM alerting truck and sedan owners to a do-over on brake recall

A recall campaign intended to address issues with braking systems on certain 2019 General Motors trucks and sedans may have introduced a new issue, the automaker has acknowledged, and thousands of owners driving repaired vehicles may need to return to their service departments for another update.  The update addresses a fix that was pushed out to owners of more than half a million brand-new GM trucks and sedans that could potentially lose partial braking function, according to the Detroit Free Press. The original software fix helped address situations where the vehicles' anti-lock braking systems would become disabled, which in turn would prevent electronic stability control from activating. Vehicles subject to the recall would often experience software glitches that prevented them from properly communicating the operational state of these systems, meaning drivers would have no idea that their brakes may not behave as expected in an emergency. The 2019 Chevrolet Silverado 1500, Cadillac CT6, and GMC Sierra 1500 were all recalled in the original campaign.  Unfortunately, the early version of this fix appears to have introduced yet another software glitch, indicating that the original fix did not do the trick. Those who have not yet had their cars serviced can rest easy; they will only receive the most up-to-date version of the software fix.  Related video    

Torque time | 2017 GMC Sierra HD First Drive

It's not the truck that counts, it's how you use it. It's the heavy stuff you fit in its bed or the extremely heavy stuff that gets hooked up to the tow hitch. The ATV, the Jet Skis, the trailer with more square footage than a Greenwich Village apartment. Perhaps you need to get Seabiscuit or, uh, Mr. Ed to wherever they need to gallop next. In our case, there's a pair of very serious-looking snowmobiles perched atop the bed of a GMC Sierra. They spread out as wide as the extended tow mirrors, and their back halves are dangling precariously beyond the truck. Sterling Archer would be giddy; I'm a little nervous. But only because canyon roads and wide vehicles with a high center of gravity go together like peas and custard. The added weight is no sweat at all. That's because this is the 2017 GMC Sierra HD Denali, a truck with the sort of enhanced power, torque, suspension, and stopping capability expected of a heavy-duty pickup. And for this year, the power and torque get a serious bump courtesy of a new 6.6-liter Duramax turbodiesel engine reengineered from almost the ground up with 90 percent new parts. It's quieter and more efficient and it emits less, while most importantly producing 445 horsepower and 910 pound-feet of torque. That's up from 397 and 765, respectively. Chevy fans will note that the same engine is also available in the updated 2017 Silverado HD. Now, for those keeping score at home, that horsepower is best-in-class but the torque number still falls short of the new Ford Super Duty and its Power Stroke diesel V8's 925 lb-ft. Aw shucks. For the record, GM's engineers didn't seem too concerned that they weren't able to eke out an extra 16 torques just to say they're No. 1. "We wanted to first meet emissions and then deliver the maximum horsepower and torque we could, and deliver it over the widest usability range possible," said chief engineer Eric Stanczak. And let's be honest here, 910 pound-feet is herculean, and once again, a jump of 145 lb-ft. Or one Subaru Impreza's worth. Or 110 more than the best Ram can do on a 2500, and its Cummins turbodiesel's 800 pound-feet was eye-popping not too long ago. (The Ram 3500 maxes out at 900 lb-ft with the right transmission.) Ah, but here's the rub. That Cummins-equipped Ram 2500 can still tow more weight according to SAE-compliant measurements – 17,510 pounds for a Ram crew cab with a short bed versus 13,000 in the similar Sierra 2500. The Ford F-250 can manage 15,000.

GMC's electric, 1,000-horsepower Hummer SUV makes a surprise appearance

We knew the GMC Hummer pickup would spawn an SUV, but we didn't expect to see it so soon. It quietly appeared in a marketing presentation about electric cars that General Motors streamed online in November 2020. The camera never focused on the SUV, there was always an executive sitting in front of it, but we see enough to tell it's closely related to its pickup sibling. Both battery-powered off-roaders are nearly identical from the tip of the front bumper to the edge of the rear doors. The SUV's overhang is a little bit shorter than the pickup's, though there's presumably space for a third row of seats. Its rear end doesn't appear in the presentation. Nothing suggests GMC made major powertrain changes to the SUV, so it's likely identical to the truck underneath the sheetmetal. Range-topping models will receive three motors zapped into motion by a 24-module Ultium battery pack. Motorists will have 1,000 horsepower and approximately 350 miles of driving range to play with. GMC plans to start building the Hummer pickup in late 2021, and the SUV might not enter production until early 2022. We expect pricing will initially start above $100,000, but more affordable variants will gradually join the lineup during the first half of the 2020s. When it lands, the off-roader will compete directly against the Rivian R1S. General Motors will invest $27 billion into electric and autonomous cars by 2023. Its portfolio of EVs will also include a Silverado-sized pickup, a crossover based on the Bolt, and a high-end Cadillac crossover named Lyriq. "We want to be number one in EVs in North America," affirmed company boss Mary Barra.