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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.

GM offering factory-backed extended warranty for Chevys, GMCs, Buicks and Cadillacs

Cars are generally more reliable than ever before. When things do go wrong, every automaker offers some form of factory warranty (in most cases at least three years and 36,000 miles, though many extend even longer), providing peace of mind to new-car buyers that many faults will be fixed at no charge to the customer. Starting today, GM is offering a new optional plan that will extend the factory warranty on all new Chevy, GMC, Buick and Cadillac products. In the past, extended warranties have been offered as dealer add-ons, with all profits from these sales going to the dealership. GM's new program can be viewed as another nail in the the looming dealership-model coffin. According to Automotive News, some dealers aren't happy to see GM cut into their business like this, saying that it helps GM far more than it does dealers. GM says the new program will help keep customers in the GM family. Customers are also more likely to visit a GM service center rather than going to an independent repair shop. Currently, new Chevy and GMC vehicles come with three-year/36,000-mile warranties. Buicks and Cadillacs are covered for 4 years or 50,000 miles. The new program extends Chevy and GMC warranties to five years or 60,000 miles. Buick and Cadillac warranties extend to six years or 70,000 miles. GM, citing IHS Markit, says most owners keep new cars for about 6.8 years, so these warranties will cover most of the length of their ownership. The extended warranty will add between $1,000 and $2,000 to the price of a vehicle, and the additional cost can be rolled into the vehicle's purchase or lease price. Unlike many dealer extensions, the factory program covers the vehicle no matter who owns it. That should help increase the car's resale value if it's sold within the covered timeframe. GM says there's no deductible and no need to file a claim form when getting warranty repairs. Additionally, dealerships can continue to sell their own extended warranties or service contracts. Related Video:

Junkyard Gem: 1998 Cadillac Catera

A decade or so after Ford tried to swipe some US-market sales from European luxury marques by selling the German-built Ford Scorpio with Merkur badging, General Motors opted to sell the German-built Opel Omega luxury sedan as a Cadillac. The Catera was a reasonably nimble rear-wheel-drive sedan with a 200-horse DOHC V6 engine, and its badge-engineered nature made it a much less costly gamble than, say, the Cadillac Allante, which had its bodies built in Italy and flown to Michigan for assembly. Unfortunately, it had no manual transmission option, and Americans who remembered the miserable US-market Opels of the 1970s were put off by the Catera's Opelness. Its $29,995 list price was quite a bit cheaper than that of the (slightly less powerful) $39,800 BMW 528i and a bit less than the (slightly more powerful) $33,585 Acura 3.2 TL's cost, but the Catera didn't sell in large numbers. This one made it to a respectable mileage figure, and the nice interior shows that it was well-cared-for during its 18 years on the road. The ads for the Catera featured a cartoon duck named Ziggy. Fast, fun, fiendishly flexible! By 2000, Cadillac had ditched the duck and was touting the Catera's value. Related Video: