1986 Chevy Caprice Box 4 Door on 2040-cars

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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 slashes prices in China as sales falter

Buying a vehicle from General Motors' stable of brands might be a lot cheaper in the near future – at least for customers in China. The effort comes as GM hopes to keep sales there growing, and the decision alludes to yet another sign that the Asian country no longer has the booming auto market of past years. GM and its Chinese joint venture partner SAIC are slashing prices by as much as the equivalent to $8,700 on 40 models from Buick, Chevrolet, and Cadillac, according to The Detroit News. Across all of automaker's nameplates, the overall sales dipped in China in April by 0.4 percent to 258,484 vehicles. Among the drops, Buick was down 8.5 percent, and Chevy shrunk 5.6 percent. Caddy's numbers increased 4.6 percent for the month, though. Buick remains a popular brand in the minds of Chinese consumers, but according to The Detroit News domestic automakers there are starting to eat into the dominance of foreign companies in the market. The country remains important for GM, though. Late last year, it outlined a future strategy that included China as a major pillar, including a $14 billion investment to build five new factories and boost sales. News Source: The Detroit NewsImage Credit: Alexander F. Yuan / AP Photo Buick Cadillac Chevrolet GM Car Buying Car Dealers saic

Junkyard Gem: 2005 Chevrolet Aveo LS Sedan

The story of Daewoo in North America took some interesting plot turns over the decades. First we had the 1988-1993 Pontiac LeMans, a rebadged Daewoo LeMans. A bit later, Daewoo began selling cars under its own nameplate here, with the Lanos, Nubira, and Leganza available for the 1999-2002 model years. Then Daewoo fled the continent and left warranty service of those cars in the hands of Manny, Moe, and Jack. With GM taking over Daewoo Motors after Daewoo's bankruptcy, we got some Daewoos with Suzuki badges here— the Verona and the Reno— while Chevrolet began selling the South Korean-built Daewoo Kalos as the Aveo for the 2004 model year. This car may not be a gem in the sense that you would want to own one, but it's a gem of automotive history and thus deserves its place in this series (especially because it's one of the rare 5-speed cars sold here). Many (maybe even most) of these cars ended up in the hands of rental-car companies and other fleet users, but we can tell from the three-pedal setup that this car went to a non-fleet buyer. We've had a couple of these cars compete in the 24 Hours of Lemons, where I work as a dignified and respected race official, and they've been amazingly quick on a road course in the hands of good drivers. Power came from this 103-horsepower Opel-designed four displacing 1.6 liters. The Nubira and Lanos got versions of this engine on these shores, too. The LS was the top trim level for the Aveo in 2004, so this car got air conditioning and a halfway decent audio system (by 2004 standards). The seat fabric is industrial-grade stuff, which would have held up well under the steady drip and/or torrents of bodily fluids coating the interiors of rental cars. The 2004 Aveo LS started at $12,045, which comes to about $16,675 in 2020 dollars, so it was a lot of commuter-appliance for the price. The following generation of this car became the Chevrolet Sonic, beginning with the 2012 model year. You can still buy a new Sonic, and the inflation-adjusted price is nearly identical to that of the original AveoÂ… though you might want to move fast if you really want one, because Daewoo stopped selling the Kalos in South Korea not long ago. If you want the rarest member of the Aveo family available in North America, find yourself a hen's-teeth Pontiac G3, the short-lived Pontiac-badged version. Speaking of the G3, here's the way it broke the hearts of gas pumps around the world.