1950 Chevrolet 3100 5-window Pickup on 2040-cars

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GM will recall 3.5 million pickups and SUVs to fix brake issue

WASHINGTON — General Motors Co is recalling 3.46 million U.S. pickup trucks and SUVs to address a vacuum pump issue that could make braking more difficult and increase the risk of a crash. The recall, which covers 2014-2018 model year vehicles, including some Cadillac Escalade, Chevrolet Silverado, Chevrolet Tahoe, GMC Sierra, Chevrolet Suburban and GMC Yukon vehicles, was triggered because the amount of vacuum created by the vacuum pump may decrease over time, GM told the National Highway Traffic Safety Administration (NHTSA) in documents posted Wednesday. NHTSA opened a preliminary investigation into the issue in November 2018, and said it had reports of 9 crashes and two injuries related to the issue. It provided GM in July with additional field reports that prompted the automaker to open an investigation. The company did not immediately say on Wednesday how many injuries or crashes are linked to the issue but said it could impact braking in "rare circumstances." GM said dealers will reprogram the Electronic Brake Control Module with a new calibration that will improve how the system utilizes the hydraulic brake boost assist function when vacuum assist is depleted. GM said the vacuum assist pump, which is lubricated with engine oil that flows into the pump through a filter screen, can in some cases lose effectiveness over time, as debris such as oil sludge can accumulate on the filter screen. GM told NHTSA that prior model years used a different brake assist system design, and vehicles manufactured after 2018 were not equipped with the affected pump design. Recalls Chevrolet GM GMC

'Killing a Duramax' Gale Banks YouTube series methodically tunes a diesel to death

Learning or perfecting a skill by watching YouTube videos is known as attending YouTube University. GM Authority picked up on one of the video site's more fascinating courses, hosted by Gale Banks; in a fair world, he should be referred to as Professor Banks when it comes to diesel engines and truck tuning. A few months after GM introduced the updated L5P 6.6-liter Duramax diesel V8 in the 2020 Chevrolet Silverado HD and GMC Sierra HD that ships with 454 horsepower and 910 pound-feet of torque, Banks decided he wanted to methodically tune the engine to death. The purpose of the resulting series, called "Killing a Duramax," is to push more power out of the engine in order to discover which parts break and when — or, as Banks puts it, force-feed the Duramax "until the crank hits the street and the heads hit the hood." With that knowledge, Banks can figure out all the weak points on his way to building what he calls a "Superturbo," that being a supercharged, twin-turbo race engine with more than 1,000 hp. What makes the series fascinating is Banks' knowledge, paired with the company's comprehensive iDash engine monitoring system that keeps tabs on a glut of parameters every step of the way. So for instance, you get Banks explaining the differences between inches of mercury and barometric pressure, how those are different from the water content of the air measured in grains, then showing those readouts on the iDash, then explaining in detail how they affect the air density in the Duramax system. The stock Borg-Warner variable turbo gets a lot of airtime — Banks accuses it of being "out to lunch" because he feels it's the weakest link on the engine. That turns into a turbo teardown and a deep explanation of performance pitfalls, such as when air pressure on the turbine begins to diverge from the boost pressure coming from the compressor. Banks says he can keep close tabs on where power's coming from, because the iDash monitors the horsepower contribution provided by the ambient air, the turbo, and the intercooler separately. The major changes so far are a stouter Precision 7675 turbo and TurboSmart wastegate (episode 5), a twin intake (episode 6), a custom liquid-cooled intercooler from a marine engine, a new GM oil cooler and synthetic oil (episode 10), and new injectors (episode 11).

2016 Chevy Corvette Z06 C7.R Edition brings track style to the road

The Chevrolet Corvette has a long history of excelling at endurance racing, and continues to dominate today. To celebrate that legacy, Chevy is bringing some of the look of its track machine to the road with the 2016 Corvette Z06 C7.R Edition. These machines might be gone faster than the racecar's lap time around Le Mans, because the company is building just 500 of them. All of these track-inspired, special editions are based on the 650-horsepower, supercharged Z06 in the top 3LZ trim, and they also come equipped with the Z07 Performance Package that includes carbon-ceramic brakes, adjustable aero elements, and Michelin Pilot Sport Cup 2 tires. Offered as a coupe or convertible, these 'Vettes use some tricks to match the style of the C7.R. They're available in the racer's traditional bright yellow livery, but black is optional. Unpainted carbon fiber trim (including material for the hood) and grilles that are painted Spectra Gray Metallic also add to the motorsport look. The car rides on a set of black wheels with Corvette Racing logos on the center caps. Inside, buyers of this limited edition are nestled in Competition Sport Seats that are upholstered in Jet Black leather. Suede microfiber accents with yellow stitching cover the steering wheel, gearshift, instrument panel and doors. Plus, there's some additional carbon fiber trim for good measure. Each car also comes with a cover with C7.R graphics. Chevy isn't disclosing the price for the Z06 C7.R Edition yet, but the limited edition model is slated to hit the market later this year. Related Video: CHEVROLET INTRODUCES 2016 CORVETTE Z06 C7.R EDITION 24/04/15 Track-to-street connection honored with limited production model BOWLING GREEN, Ky. – Chevrolet today introduced the 2016 Corvette Z06 C7.R Edition – a road-going, track-capable homage to the Corvette Racing C7.R racecars. It's offered in Corvette Racing's signature yellow livery – or black – with coordinated exterior and interior accents. Only 500 examples of the C7.R Edition will be built and all will include the Z07 Performance Package with carbon ceramic brakes, as well as a specially serialized vehicle identification number. They go on sale later this year. "Corvette Racing's legacy and technology were significant influences on the development of the Corvette Z06 and the new C7.R Edition honors the direct link between the racecar and the production model," said Harlan Charles, Corvette product and marketing manager.