1963 Chevrolet Corvette on 2040-cars

Auto blog

How GM engineers are using diaper 'snow' to keep you warm

Testing how snow affects General Motors' vehicles isn't really a problem right now for the company's engineers, but in the dog days of summer the process isn't exactly easy. The only real option is for them to book time at the automaker's climatic wind tunnel. However, a flash of brilliance from an engineer allows snow to be simulated regardless of the temperature outside, and the discovery is all because of his daughter's wet diaper. The realization came to GM Thermal Systems engineer Nicholas Jahn while he was swimming with his daughter and noticed how her diaper ballooned in size in the water. He found out the substance that makes this possible is called sodium polyacrylate. When the material gets wet it grows and forms fluffy flakes that are a close imitation of snow. Best of all, the stuff can be prepared easily any time of the year, and it's reusable. The engineering team uses the material to test the effectiveness of the heating systems of GM's vehicles. They spread the sodium polyacrylate over the inlets at the base of the windshield to obstruct the airflow and then crank the heater. After some time, they can see how much is being sucked into the system and design more efficient systems in the future. See how the process works in the video above and read about the diaper discovery in GM's press release below. Diapers Change Chevy Cruze Winter Warm-up Time GM validation engineer uses diaper material "snow" to reduce frigid drives 2015-01-06 DETROIT – An item commonly found on an infant's changing table is helping General Motors' engineers simulate snow year round, ensuring heating systems in cars like the 2015 Chevrolet Cruze can quickly and efficiently warm its interior. Packed snow can prevent air from entering the inlet panel at the bottom of the windshield, obstructing the flow of air into the heating system and reducing the amount of air it can push out. This can lead to less efficient warming of the car's interior and windshield defrosting. "The last thing anyone wants to do when it's freezing cold out is scrape their windshield," said Nicholas Jahn, GM Vehicle Thermal Systems engineer. "The testing we perform on the Chevrolet Cruze with the diaper material allows us to maximize the car's heating capabilities." Ironically, Jahn stumbled upon his diaper-based testing method in the middle of summer. During a swim with his daughter, he noticed her diaper multiplied in size when it came into contact with water.

GM recalling 521,817 cars in two campaigns

General Motors is issuing two, separate recalls covering a total of 521,817 vehicles worldwide. The larger campaign covers 468,887 units of the 2011-2012 Chevrolet Malibu. Specifically, 437,045 of these are in the US, and the rest are outside the country. In these sedans, a steel cable that connects the seat belt to the vehicle can fatigue and separate. GM knows of 36 claims about the problem but only one minor injury. According to The Detroit News, this happened when a taxi driver hit his head. To fix things, dealers will replace the "outboard lap mounting bracket," which will move the tensioner rearward. They'll also inspect and if necessary replace the steel cable and lap pretensioner. In the second campaign, 52,930 examples the 2015 Chevy Colorado and 2015 GMC Canyon have seat frame attachment hooks that were installed incorrectly during assembly. GM hasn't received any reports of crashes, injuries, or fatalities about this problem. Dealers will inspect the affected trucks and repair as necessary. GM spokesperson Alan Adler told Autoblog that he didn't yet have a specific date when affected owners would receive official mailings about either of these recalls. GM Statement General Motors is recalling 48,309 2015 model year Chevrolet Colorado and GMC Canyon midsize pickup trucks in the U.S. because certain seat frame attachment hooks were not properly attached to the vehicle body during assembly. Dealers will inspect the potentially affected seats for proper installation and repair if necessary. GM knows of no crashes, injuries or fatalities related to this condition. The total vehicle population of the recall is 52,930 including 4,620 vehicles sold in Canada. General Motors is recalling 437,045, 2011-2012 model year Chevrolet Malibus in the U.S. because the flexible steel cable that connects the safety belt to the vehicle can fatigue and separate over time as a result of occupant movement in the seat. Dealers will replace the outboard lap mounting bracket to relocate the tensioner slightly rearward. Dealers will inspect the cable and, if necessary, replace the lap pretensioner. GM knows of 36 claims, no crashes or fatalities and one minor injury reportedly related to the condition. The total vehicle population of the recall is 468,887 including Canada, Mexico and exports.

Chevy Silverado Midnight Edition coming to Chicago

Between the GMC Canyon Nightfall Edition and Chevy Silverado Custom Sport, the truck divisions of General Motors had no lack of blacked-out custom pickups to showcase at the Detroit Auto Show this year. But now the General has announced one more. Called the Midnight Edition, for this special Silverado blacks out all the trim, including the grille, bumpers, headlamp bezels, tow hooks, fog lamps, side and beltline moldings, 19-inch wheels, bedliner and bowtie emblems. It's based on the Silverado 1500 with the Z71 package, so it also boasts an off-road suspension, locking rear differential, hill-descent control and trailering pack. While it was at it, Chevy has also thrown in rear park assist and power heated door mirrors. Buyers will be able to choose between double- or crew-cab models, but no more than 5,000 examples will be produced this year, each priced at a premium pegged between $1,595 and $1,995 (depending on the model). The Silverado Midnight edition debuts today at the National Automobile Dealers Association convention in San Francisco and will be showcased at the Chicago Auto Show next month, around the time that deliveries will commence. 2015 Silverado Midnight Edition is The New Black Monochrome appearance package to debut at NADA and Chicago Auto Show 2015-01-22 DETROIT – Truck fans know that nothing adds presence to a pickup like basic black. And Chevrolet is taking black to the next level with the Silverado Midnight special edition, on display starting today at the National Automobile Dealers Association Convention & Expo in San Francisco, and making its public debut February 14 at the Chicago Auto Show. Beginning with a black Silverado Z71, the Midnight special edition adds: - An all-black front end with body-colored grille, bumper, headlamp bezels, tow hooks and fog lamps; - Black side moldings and beltline moldings; - 18-inch black painted alloy wheels with Goodyear Wrangler Duratrac all-terrain tires; - Special Z71 badges on the doors; - A spray-in bedliner (black, of course); - And the finishing touches – black Chevrolet bowties front and rear. Like all 2015 Silverado 1500 Z71s, Midnight special editions include off-road suspension, a locking rear differential, Hill Descent Control and a trailering package. Midnight special editions also include rear park assist and heated, power-adjusted outside rear-view mirrors.