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NHTSA closes 4-year GM investigation, issues common sense advisory [w/video]

Since January 2011, the National Highway Traffic Safety Administration has been investigating a possible problem with corroding brake lines in General Motors' GMT800-platform models, like the Chevrolet Silverado and Suburban and GMC Sierra, in states with salt on their roads in the winter. However, as opposed to launching a full recall of millions of vehicles, the government is issuing a common-sense safety advisory to all drivers in snowy states to keep their vehicle's undercarriage clean. It even has a video explaining things. "Older-model vehicles, often driven in harsh conditions, are subject to corrosion over long periods of time, and we need owners to be vigilant about ensuring they, their passengers, and others on the roads are safe," said NHTSA Administrator Mark Rosekind in the announcement of the end of the investigation. The agency was clear in its report that "brake line corrosion seen in the GM vehicles was not unique," and the government "has not identified a defect that would initiate a recall order." Instead NHTSA is advising drivers, especially those of vehicles from before 2007, to wash their vehicle's undercarriage in the winter and spring to remove salt or other de-icing chemicals. It also recommends regular checks by a mechanic to make sure everything is in proper order. According to the investigation documents, for just the GMT800 platform models, NHTSA found 3,645 complaints of brake line corrosion, which included allegations of 107 crashes and 40 injuries. The issue was found to be more common in vehicles over 10 years old. GM has released a statement (embedded below) that the company "supports the consumer advisory from NHTSA urging regular maintenance and care of brake lines on older vehicles." NHTSA Closes Investigation into Brake-Line Failures NHTSA 13-15 Thursday, April 9, 2015 Agency issues safety advisory on preventing undercarriage corrosion WASHINGTON – The Department of Transportation's National Highway Traffic Safety Administration (NHTSA) today issued a Safety Advisory and consumer video encouraging owners of model year 2007 and older trucks, SUVs and passenger cars to inspect brake lines and thoroughly wash the underside of their vehicles to remove corrosive salt after the long winter in order to prevent brake-line failures that increase the risk of a crash.

GMC Hummer EV revealed as a 1,000-hp, 350-mile, fast-charging beast

The 2022 GMC Hummer EV has finally been revealed, and it certainly looks the part. It has chunky, squared-off styling, big tires pushed to the edges, and a towering fascia. But it’s not a case of form over function. On the contrary, the Hummer EV is has some pretty wicked technology and gear under the skin. The first version of the Hummer EV that will be available is the tricked-out Edition 1. It features three electric motors, which allows for torque vectoring. These motors make 1,000 horsepower, though GMC still hasnÂ’t given real-world torque numbers. The motors are fed by a 24-module Ultium battery pack. The pack can provide an estimated 350 miles or more of range. Not only that, but it supports 800-volt fast charging up to 350 kW. ThatÂ’s comparable to PorscheÂ’s charging system, and GMC says it can add an extra 100 miles of range in just 10 minutes. Later, a two-motor Hummer EV and a three-motor version without torque vectoring. The Hummer EV rides on fully independent suspension with adaptive air shocks. They can provide continuous damping adjustments for comfort, and have a height adjustment range of 6 inches. When set in its max-height off-road mode, it has two additional inches of ground clearance, and the "Extract Mode" will lift it six inches higher than default. The Edition 1 model also comes with standard 35-inch mud terrain tires, and combined with the suspension, the Hummer EV has a fording depth of 2 feet and the capability to climb over an 18-inch vertical obstacle. Owners will be able to easily add more clearance since GMC made the wheel arches large enough to accommodate aftermarket 37-inch tires. Additional off-road goodies include skid plates along the chassis, rock sliders, the previously covered four-wheel steering with Crab Mode diagonal driving, and 18 camera views including angles under the truck for getting over rocks. Those cameras feature sprayers, too to keep them clean. Detailed information on torque output, torque vectoring, tire pressure, vehicle angles and more are also displayed on the infotainment screen. Speaking of that infotainment screen, itÂ’s a massive 13.4 inches and is paired with a 12.3-inch instrument display. They feature proudly in a squared-off, rugged-looking interior. The Hummer EV will get the latest version of Super Cruise, complete with automatic lane-changing. The Edition 1 gets the removable roof panels as standard, and those roof panels are clear, so you can still get some sun with them in place.

2022 GMC Sierra gets overhauled interior, new Denali Ultimate and AT4X

GMC Sierra's 2022 update is here, boasting a ground-up interior redesign, an updated Super Cruise package with trailering support, and two new trims aimed at very different buyers. While the GMC Sierra's bones are undeniably good, its interior has really held it back from our full-throated support in recent years. The pricier trims of the refreshed 2022 model may well erase those shortcomings entirely.  Hot on the heels of its revamped platform mate, the 2022 Chevrolet Silverado, the new Sierra arrives with a similar suite of upgrades, plus a few items that will remain exclusive to the fancy-pants Sierra for now, like Enhanced Super Cruise with available automatic lane-change and trailering mode. As with the Silverado, the Sierra's 2.7-liter four-cylinder gets an upgraded block and internals, allowing for a higher torque output (420 pound-feet), which means it makes even more torque than the 5.3-liter V8. Diesel models also enjoy some chassis upgrades that allow for the fitment of GMC's Max Tow package. That allows a diesel Sierra 1500 4x2 to handle 13,200 pounds and the 4x4 model to tow up to 13,000 even.  Still, the 2022 Sierra's most noteworthy improvements are to be found inside, and what better way to showcase an upgraded interior but with a new, range-topping luxury trim? Say hello to the 2022 GMC Sierra Denali Ultimate.  This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. 2022 GMC Sierra Denali Ultimate unveiled Denali represents a huge chunk of Sierra sales, and when your branding is based around upscale sophistication, you sure want to put your best foot forward at the top of the pricing structure. GMC wasn't quite there with the outgoing Sierra Denali, but the new Denali Ultimate may just be the ticket to one-upping the likes of the swanky Ram 1500 Limited.  This is the no-holds-barred, all-options-checked model that really makes GMC money. The 6.2L V8, 10-speed automatic and Super Cruise are standard on Denali Ultimate. All of the leather and wood elements visible here are real (seriously, you can touch them and everything). There's also a faux suede headliner, 16-way power-adjustable and massaging front seats, a 12-speaker Bose system and a 15-inch color HUD included.  GMC included several unique elements for Ultimate, including topographical maps and the latitude and longitude of Mount Denali formed into various interior trim pieces.