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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.

New presidential limo spotted in use for the first time

It has been a long lead-up to the new presidential limousine, but now it appears General Motors has "The Beast" in working order for President Donald Trump. The new limo was spotted in public for the first time this weekend in New York City in Trump's motorcade, reportedly on its way to Trump Tower. Said to have been in development since 2013, the $15.8 million armored Cadillac is making its debut as Trump's ride to the U.N. General Assembly this week. The grille suggests looks along the lines of a Cadillac CT6 V-Sport, but the similarities don't go much beyond that. If you look closely, Trump appears to be in the second "Beast" of the twin truck-based Cadillacs that go by in the video. The limo has a diesel engine to propel its near-20,000-pound self down the road, but we couldn't detect much of an oil-burner sound over those gigantic truck tires. This week in NYC will showcase motorcades and fancy presidential limos from around the world, all coming in for the big annual meeting at the U.N. Trump's presidential limos get shipped around the world too because they have their own plane: a C-17 Globemaster cargo carrier. There's no shortage of cool features on the new limo, and we detailed those here. While some of the awesome defense mechanisms are public knowledge, we're sure there are plenty that remain classified. New model presidential limo noticed awaiting Pres Trump at Wall Street heliport. Photo by @stevebruskCNN pic.twitter.com/lEytRcJ9rt — Mark Knoller (@markknoller) September 23, 2018 Featured video:

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.