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How GM's grueling 24-hour test gets the kinks out of its performance cars

One of the biggest challenges automakers face when designing a high-performance car is making sure that it is both fast and reliable. For General Motors, any car that might be taken to the track by its owner - like the Corvette, Camaro Z/28 (shown above) and the Cadillac CTS-V, for example - undergoes a rigorous and strenuous 24-hour test by engineers at the Milford Proving Grounds, as pointed out by Car and Driver.
We've posted on this topic in the past - on a video showing the Camaro ZL1 being brutalized, for instance - but this article gives a more in-depth look at what actually happens behind the scenes... including what that poor ZL1 went through. Though the test isn't for 24 hours straight, the cars are pushed as hard as possible by some of GM's best drivers with only the brakes and tires replaced frequently.
We don't want to ruin the fun for you, but it is an interesting article that tells just some of what GM does to develop its sports cars. Check out the full article over at Car and Driver for the rest of the story.

Cadillac CT6 production ceases January 2020 as part of D-Ham layoffs

General Motors filed paperwork under the Worker Adjustment and Retraining Notification Act with Michigan's Department of Labor and Economic Opportunity this week, detailing events to come at the automaker's Detroit-Hamtramck Assembly Plant. Starting February 28, 814 salaried and hourly workers at D-Ham, as its called, will be laid off. The 753 workers represented by the UAW will begin receiving offers in January to relocate to facilities in Michigan and Ohio, or buyout offers. As the 4-million-square-foot plant winds down through April 3 to a skeleton crew, the Cadillac CT6 ceases production in January 2020, and the last Chevrolet Impala comes off the line on February 28. The loss of the CT6 represents the end of Cadillac's latest brief, and highly regarded, adventure into flagship sedans. It might also mean the end of the 4.2-liter Blackwing twin-turbo V8 engine, at least for the moment. Both casualties are calamities. The death of the Impala closes the door on a nameplate in production for 52 years since 1957, having started off as a top-tier trim for the 1958 Bel Air known as the Bel Air Impala, once advertised with the line, "Lets you know you're the boss." As part of the new four-year labor agreement with the UAW, GM is keeping D-Ham open to build a new line of battery-electric vehicles, ultimately investing $3 billion and tripling employment to 2,225 workers when fully operational. The agreement described the coming EV as a "van" that would commence production in late 2021, but various reports say what's actually coming is a range of premium EVs in pickup and SUV bodystyles under the program codename BT1. The easy predictions put an electric GMC Sierra and Cadillac Escalade among the EV fold, but not until 2023, according to auto industry forecaster LMC Automotive. Before that, LMC claims an electric van will debut in late 2021, along with a battery-powered rebirth of the Hummer brand in pickup and SUV forms, also in late 2021. 

Junkyard Gem: 1997 Cadillac Catera

GM's Cadillac Division was having a tough time in the early 1990s, with an onslaught of Lexuses and Infinitis pouring across the Pacific to steal their younger customers while high-end German manufacturers picked off their older customers. Flying an S-Class-priced model between assembly lines in Turin and Hamtramck hadn't worked out, so why not look to the European outposts of the far-flung GM Empire for the next Cadillac? That's how the Catera was born, and I have found a rare first-year example in a North Carolina car graveyard. Across the Atlantic, GM's Opel and Vauxhall were doing good business with prosperous European car buyers by selling them the sleek rear-wheel-drive Omega B (whose platform also lived beneath the Holden VT Commodore in Australia). Here was a genuine German design that competed with success against BMW and Audi on their home turf! So, the Omega B was Americanized and renamed the Catera. Opel wasn't a completely unknown brand to Americans at the time, since its cars were sold here with their own badging through Buick dealerships from the middle 1950s through the late 1970s (for a much shorter period, American Pontiac dealers attempted to sell Vauxhalls). Even after that, plenty of Opel DNA showed up in the products of U.S.-market GM divisions. The Catera was by far the most affordable Cadillac for 1997, with an MSRP starting at $29,995 (about $59,113 in 2024 dollars). Being a genuine German car, it looked much more convincingly European than the DeVille ($36,995), Eldorado ($37,995) and Seville ($39,995). Inspired by the ducks on the Cadillac emblem (they were really supposed to be martlets, mythical birds with no feet and occasionally lacking beaks), Cadillac's marketers went after youthful car shoppers with a whimsical animated duck named Ziggy. For the 21st century, the birds were removed from the Cadillac emblem in order to attract California buyers under 45 years of age. As we all know, the Catera flopped hard in the marketplace. What sold well in Europe turned out not to translate so well in in North America, especially when bearing the badges of such a historically prestigious brand. The Catera's engine was a 54-degree 3.0-liter V6 rated at 200 horsepower and 192 pound-feet. Just as had been the case with its predecessor, the Allante, no manual transmission was available.