1979 Buick Riviera S-type Turbo - 49k Miles! on 2040-cars

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Buick really wants us to know the new Cascada convertible won't leak

Quality testing on the factory floor is nothing to joke about. Automakers need to make sure the work being done is up to snuff, and that means some extensive checks. For Buick, that means using a lot of water for each of its Cascada convertibles. Each vehicle that rolls off the floor is subject to a high-pressure, ten-minute soaking that sprays nearly 20 gallons of water from each nozzle during every bath, just to guarantee the fabric roof hasn't sprung any leaks. For some reason, Buick has chosen to show off this testing with the help of what we imagine is the Gorton's Fisherman's baby cousin. Check out the strange testing video, available up top.

Opel Insignia OPC getting facelift. Will the Buick Regal GS see it, too?

We've seen spy shots of the base Opel Insignia wearing facelifted front and rear ends, and now it appears that the more potent OPC version will be benefitting from a nip/tuck, as well.
The front bumper has been redesigned, incorporating new air intakes - toned-down versions of the model's signature fangs - as well as a new grille. Out back, there will be minimal changes to the overall fascia, most likely stuff like slightly redesigned taillamps, and inside, these spy shots show a larger navigation/infotainment screen sitting atop the center console.
This is all well and good for the Insignia, but we're wondering how these changes will impact North America's Buick Regal GS. No, it may not share the same powertrain punch as the Euro-spec OPC, but visually, the cars are nearly identical. When questioned about possible changes for the GS, a Buick spokesperson told us that the automaker "can't comment" on any changes at this point. Even so, we wouldn't be surprised if some small changes come our way in the next year or so.

1969 Chevrolet Chevelle vs 1987 Buick GNX in Generation Gap showdown

Generation Gap generally tries to adhere to a theme for each episode, and for the final video from the Lingenfelter collection, the series might have its best idea yet - limited-production muscle cars from General Motors.
On one side you get a 1969 Chevrolet Chevelle COPO, and it's an absolute sleeper. Other than the SS wheels, this classic coupe looks practically bone stock, at least until the engine fires up. Under the hood is a 427-cubic-inch (7.0-liter) V8 making a claimed 425 horsepower and 460 pound-feet of torque. This was the sole year for the COPO package on the Chevelle, and Chevy only made about 323 of them.
The Chevelle's challenger is almost as rare and arguably just as cool. The 1987 Buick Grand National GNX looks just as mean today as when new. It eschews a traditional muscular V8 in favor of a 3.8-liter turbo V6 making a claimed 276 hp and 360 lb-ft, although that number is supposedly a bit underrated. Also, just 547 examples of the GNX version were ever built making it quite a collector's item too.