1997 Chevrolet Astro Base Standard Passenger Van 3-door 4.3l on 2040-cars

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'Killing a Duramax' Gale Banks YouTube series methodically tunes a diesel to death

Learning or perfecting a skill by watching YouTube videos is known as attending YouTube University. GM Authority picked up on one of the video site's more fascinating courses, hosted by Gale Banks; in a fair world, he should be referred to as Professor Banks when it comes to diesel engines and truck tuning. A few months after GM introduced the updated L5P 6.6-liter Duramax diesel V8 in the 2020 Chevrolet Silverado HD and GMC Sierra HD that ships with 454 horsepower and 910 pound-feet of torque, Banks decided he wanted to methodically tune the engine to death. The purpose of the resulting series, called "Killing a Duramax," is to push more power out of the engine in order to discover which parts break and when — or, as Banks puts it, force-feed the Duramax "until the crank hits the street and the heads hit the hood." With that knowledge, Banks can figure out all the weak points on his way to building what he calls a "Superturbo," that being a supercharged, twin-turbo race engine with more than 1,000 hp. What makes the series fascinating is Banks' knowledge, paired with the company's comprehensive iDash engine monitoring system that keeps tabs on a glut of parameters every step of the way. So for instance, you get Banks explaining the differences between inches of mercury and barometric pressure, how those are different from the water content of the air measured in grains, then showing those readouts on the iDash, then explaining in detail how they affect the air density in the Duramax system. The stock Borg-Warner variable turbo gets a lot of airtime — Banks accuses it of being "out to lunch" because he feels it's the weakest link on the engine. That turns into a turbo teardown and a deep explanation of performance pitfalls, such as when air pressure on the turbine begins to diverge from the boost pressure coming from the compressor. Banks says he can keep close tabs on where power's coming from, because the iDash monitors the horsepower contribution provided by the ambient air, the turbo, and the intercooler separately. The major changes so far are a stouter Precision 7675 turbo and TurboSmart wastegate (episode 5), a twin intake (episode 6), a custom liquid-cooled intercooler from a marine engine, a new GM oil cooler and synthetic oil (episode 10), and new injectors (episode 11).

2014 Chevrolet Silverado and GMC Sierra show all their sides in Detroit

There could hardly be more riding on the next-generation General Motors full-size pickup trucks, so the automaker has wisely made sure to have a selection of different models on hand at the Detroit Auto Show to show off. The 2014 Chevrolet Silverado and 2014 GMC Sierra were both officially introduced last month at a stand-alone reveal, and now they'll be on display for the public to see in various body configurations and trim levels.
The Silverado LTZ Crew Cab and Sierra SLE Extended Cab are aimed at providing more of a high-end pickup experience, while the Silverado LT Z71 Extended Cab and Sierra SLT Z71 Crew Cab should have off-road fans scouting out their favorite trails. The crew cab trucks won't go into production until sometime during the second quarter of this year - with other bodystyles coming later in the year - but we have plenty of live images from Detroit for you to enjoy.

Made in America | These cars top the most-American list

The car with the most American/Canadian content for 2022 is ... cue the drumroll ... the Lincoln Corsair, in both standard gasoline-fueled and plug-in hybrid guise. Both versions of Lincoln's compact luxury crossover earned a score of 86 — due to 72% of its parts coming from one of the two aforementioned countries — in the American University Kogod Business School's annual "Made in America Auto Index." Last year's leader, the 2021 Ford Mustang GT (when equipped with a manual transmission) fell all the way to 22nd place with a 50% rating due to a switch in transmissions sourced from Mexico. In case you're interested, that puts Ford's red-blooded American ponycar below vehicles like the Kia Sorento, Mercedes-Benz GLE-Class SUV and Lexus ES. If you're wondering how an American car that's assembled within the borders of the United States could rank below a model from a Korean, German or Japanese automaker, well, we'll let Kogod explain: "The components of the index are based on research performed by the Center for Automotive Research in Ann Arbor Michigan regarding the economic value of different components of auto manufacturing. For example, the highest ranked cars are made by U.S.-based manufacturers using American engines and transmissions, and with a high AALA percentage of U.S. and Canadian parts." There are 25 total vehicles listed in the Top 10 (there are lots of ties this year). Here's the full list: (1) Lincoln Corsair: 86 (1) Lincoln Corsair PHEV: 86 (2) Tesla Model 3 Long Range: 82.5 (3) Chevrolet Corvette Sting Ray: 81 (4) Chevrolet Colorado: 80.5 (5) Jeep Cherokee Latitude 4x4: 80 (5) Jeep Cherokee Trailhawk: 80 (5) Tesla Model 3 Performance: 80 (5) Tesla Model Y: 80 (6) Dodge Durango Citadel: 79.5 (6) Dodge Durango Blacktop AWD: 79.5 (7) Honda Passport Trailsport: 78.5 (8) Ford F-150 2.7L, 3.3L, 5.0L: 77.5 (8) Ford Ranger: 77.5 (8) Ford Bronco automatic: 77.5 (8) Tesla Model S: 77.5 (8) Tesla Model X: 77.5 (9) Jeep Grand Cherokee Laredo 3.6L: 77 (9) Jeep Grand Cherokee L LTD: 77 (9) Jeep Grand Cherokee Overland 3.6L: 77 (9) Chevrolet Camaro automatic: 77 (10) Honda Odyssey: 76 (10) Honda Ridgeline: 76 (10) Honda Pilot: 76 There's a whole long list of reasons for the above scores, with seven criteria that include factory location, headquarters location and where its various bits and pieces come from.