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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 to announce second U.S. battery plant, in Tennessee, with LG Chem, sources say

General Motors and South Korean joint-venture partner LG Chem will announce a second U.S. battery cell manufacturing plant on Friday, revealing plans for a $2.3 billion factory in Spring Hill, Tennessee, three people familiar with the matter said. The plant will use a different, more cost-effective battery chemistry than the one the companies will offer from the joint-venture plant they are building in Lordstown, Ohio, the sources said on Wednesday. The battery will be for the Cadillac Lyriq electric crossover vehicle that GM will begin building at its nearby Spring Hill assembly plant next year, the sources said. The timing of the Tennessee battery plant's opening is unclear, but there will be a period when the battery is supplied for the Lyriq by another LG facility until the Tennessee plant opens and it will not come from Lordstown, one of the sources said. GM would not confirm the details and declined further comment, and a spokesman for LG did not have an immediate comment. A Tennessee economic development spokeswoman also declined to comment. The No. 1 U.S. automaker previously said it was exploring the feasibility of another U.S. battery cell plant with LG's battery unit, LG Energy Solution, via its Ultium Cells LLC joint venture. Sources previously told Reuters that GM and LG Chem were in advanced talks with Tennessee officials, and that the plant there would be similar in scope to the $2.3 billion Lordstown plant. GM said in October it would invest $2 billion in Spring Hill to build EVs. The Detroit automaker said last year it was investing $27 billion in electric and autonomous vehicles over the next five years. Sources previously said GM would need more battery plants beyond the Tennessee one to meet aggressive EV targets. GM has set a target in January of halting sales of light-duty gasoline and diesel-powered vehicles by 2035. LG Energy said last month it planned to invest more than $4.5 billion in U.S. battery production over the next four years, including plans to build at least two new plants. LG had been embroiled in a high-profile dispute with rival South Korean firm SK Innovation in the United States after LG alleged SK stole trade secrets, but the companies settled that and other disputes with SK agreeing to pay $1.8 billion to LG. (Reporting by David Shepardson in Washington and Ben Klayman in Detroit; Editing by Matthew Lewis) Related Video:

Next Cadillac Escalade's interior spied for the first time

Update: Now that new spy photos of another large GM SUV have surfaced, we believe these shots show us a GMC Yukon interior, not a Cadillac Escalade. You can see the new spy shots here that depict a much more upscale vehicle interior compared to the fuzzy center stack shown in the shots of the Yukon. The new Cadillac Escalade has a lot of work to do in order to properly compete with Lincoln's wonderfully luxurious Navigator. These interior spy photos are our first look at what Cadillac is working with on the inside of its new luxury truck. We won't make final judgements, as this vehicle is still a prototype and subject to change. However, a few key bits are noticeable from the fuzzy photos. As expected, Cadillac's CUE infotainment and center stack is nowhere to be seen. Replacing it is a new interior design language, with a tablet-like screen that seems to rise out of the sloped stack on top. Below the screen is a strip of stitched leather and a couple prominently placed air vents. To the left of this area is what appears to be a push-button gear shifting system, replacing the column-mounted shifter currently in use. Below all that on a lower level of the center stack are all the climate controls, along with what look like physical buttons for what could be audio-related controls. Does it look as luxurious as the Lincoln? Not with all the coverings and shrouding it doesn't, which means we'll have to wait until we get the full picture. One thing that's clear is that the interior design is definitely going to be wildly different than the current Escalade. That center stack flows downward as one sloping piece into the high and bulky center console area. This design looks like it brings the center console further downward, and also uses a multi-tiered look. It's tough to read what's on the screen, but the software looks like the same stuff we got a preview of on the new Cadillac CT5 and CT4 sedans. As for the exterior shots, there's almost nothing that we haven't already gotten a taste of in previous spy photos. The independent rear suspension is a go, as are what appear to be massive headlight and LED DRL fixtures. If you look through the wrapping, you can make out how far up and down the lighting fixtures stretch ... or perhaps they're separate units altogether. It's tough to tell at this point.