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GM's redesigned full-size 2021 SUVs face delay over coronavirus

As General Motors works to conserve cash for the coronavirus pandemic, the automaker reportedly told suppliers that it is postponing development of several future vehicles. The situation may cause GM to delay the launch of the 2021 Cadillac Escalade, GMC Yukon, Chevrolet Tahoe and Chevrolet Suburban SUVs, which had been planned to roll out in April. The original launch plan for the redesigned full-size SUVs, which are some of the most profitable vehicles produced by GM, had called for production of the current models to end at its plant in Arlington, Texas, this week. After a retooling process, the redesigned SUVs were slated to begin production late in the month of April. In an email to suppliers viewed by Reuters and confirmed as authentic by GM, the automaker also said it was suspending development work on six future vehicle programs, including updates of the Chevrolet Equinox, GMC Terrain, Cadillac XT4, Bolt EV, Chevrolet Silverado and GMC Sierra. GM said preproduction work on those programs would be pushed back to calendar year 2021, with most of the updated vehicles scheduled to be launched as 2022 models. According to the Detroit News, work has also been paused on the Chevy Camaro and a future version of the Corvette that has yet to be unveiled and wasn't planned for production during the 2020 calendar year. Last week, the automaker told employees and suppliers it was delaying work on some future vehicles while pushing ahead with near-term models such as its redesigned full-size SUVs and the GMC Hummer EV, Cadillac Lyriq, Chevrolet Bolt EUV and Cruise Origin, as well as its new Ultium battery system. A GM spokesman who spoke with Reuters reiterated on Monday what the automaker had said last week — that the situation with its U.S. plants was "fluid" and that the automaker would "continue to evaluate" whether and when to reopen those plants on a week-by-week basis, with "employee safety" guiding that decision. GM said previously that it was closing most of its U.S. plants indefinitely. In its Monday email, GM asked suppliers to stop work on all pre-production tooling and pre-production parts manufacturing, but also not to dispose of any tooling or materials. GM told Reuters it had solicited volunteers from its workforce to finish the build-out of the current SUVs on a single shift in Arlington.

'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).

GM to offer 2 years free maintance on most 2014 models

A day after Ford announced it was scaling back the complimentary maintenance program for its Lincoln brand, General Motors has gone in the completely opposite direction, offering most of its 2014 lineup with free maintenance. Since 2011, Cadillac models have all come with a four-year/50,000-mile complimentary maintenance program, but Chevrolet, Buick and GMC vehicles will now come standard with free maintenance for two years or 24,000 miles for the 2014 model year.
The program will give vehicle owners and lessees free oil changes, tire rotations and 27-point inspections following the recommended maintenance schedule laid out in each vehicle's owner's manual. We contacted GM to see which vehicles were eligible for the program, and a spokesperson got back to us with the following comment:
"All 2014 models are eligible, it's just that the included services vary by model, e.g., Spark EV would not need oil changes, Corvettes don't recommend tire rotations."