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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.

2023 Chevy Equinox price goes up a few hundred bucks

Chevrolet and GMC have uploaded the configurators for sibling crossovers the 2023 Chevy Equinox and 2023 GMC Terrain. Both get a few changes to improve performance, and new paints. GM jettisoned the turbocharged 1.5-liter gas engine making 170 horsepower and 203 pound-feet of torque in both vehicles. Replacing it is a different turbocharged 1.5-liter gas engine making 175 hp and 203 lb-ft. The Equinox sends its power through a six-speed transmission, the Terrain fits a nine-speed transmission. On the Equinox, fuel economy in standard front-wheel drive trims holds steady, but the AWD trims lose one mile per gallon in their city and combined EPA ratings. On the Terrain, FWD trims lose one mile per gallon across the board, the AWD trims lose one mile per gallon in the city only. Both models also upgrade to an electro-hydraulic brake system, leaving vacuum-assisted braking behind. The Equinox color palette drops Cherry Red Tintcoat, Seaglass Blue Metallic and Silver Ice Metallic for replaces with Harvest Bronze Metallic, Radiant Red Tintcoat, and Sterling Gray Metallic. Buyers who want the razzle dazzle of the Equinox's optional Blackout and Redline Edition Packages are out of luck at the moment, both appearance flourishes unavailable to order. The Terrain's paint menu drops Cayenne Red Tintcoat, Hunter Metallic, and Quicksilver Metallic for Deep Bronze Metallic, Sterling Metallic, and Volcanic Red Tintcoat. All-wheel drive can be added to any Equinox and Terrain trim for $1,600, save for the Terrain AT4 and Denali that come standard with AWD. Prices for the 2023 Chevy Equinox after the $1,395 destination charge, and their differences from 2022, are: Equinox LS: $27,995 ($300) Equinox LT: $29,095 ($300) Equinox RS: $32,095 ($100) Equinox Premier: $33,195 ($300) New pricing for the 2023 GMC Terrain can only be seen when you visit the configurator's Summary page. The initial Build & Price page shows MSRP before the $1,500 premium on every trim to that pays for the mandatory OnStar with Connected Services plan. After the $1,395 destination charge, the new prices are: Terrain SLE: $31,295 Terrain SLT: $35,295 Terrain AT4: $37,395 Terrain Denali: $39,995  

Lutz dishes dirt on GM in latest Autoline Detroit

Bob Lutz sits down for Autoline Detroit - Click above to watch video after the jump
Autoline Detroit recently played host to Bob Lutz, and, as is always the case, the former General Motors vice chairman dished out some great commentary. Lutz was promoting his new book Car Guys vs. Bean Counters: The Battle for the Soul of American Business, and talk quickly turned to his role as it related to product development and high-level decision making at GM. While on the topic of brand management, Lutz revealed a few rather interesting tidbits about his former employer:
All Chevrolet vehicles were required to have five-spoke aluminum wheels and a chrome band up front, as part of the Bowtie brand's overall image.