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GM to unveil new SUVs at the State Fair of Texas?

With General Motors just having rolled out its new fullsize truck twins - the Chevrolet Silverado and GMC Sierra - for 2014, now it seems to be time to focus on its big SUVs. The Truth About Cars is reporting that the 2015 Chevy Tahoe/Suburban and 2015 GMC Yukon lineup will be making their debuts later next month at the State Fair of Texas, which kicks off on September 27.
To date, we've only seen spy shots of the new Chevy and GMC SUVs (shown above in Yukon XL guise). Based on those spies both trucks seem to be taking a different styling direction than their pickup truck counterparts - just check out the Ford-looking headlight design on the next-gen Chevys.
We reached out to GM for comment and heard back simply that there is no official announcement about the new Tahoe, Suburban and Yukon. Still, the report definitely makes a solid leap of logic, as Texas is a top market for GM's fullsize SUV lineup. It also appears that GM is still planning a separate launch for the next-gen Cadillac Escalade.

2022 GMC Sierra 1500 Denali interior spied with dramatic redesign

The 2022 GMC Sierra’s interior overhaul is coming into better view with these new spy shots revealing a totally new dash.  GMC teased out a few changes when it announced Super Cruise was coming to the 2022 Sierra, but only so much was visible in the tightly cropped photo. These spy shots tell a fuller story about whatÂ’s going on inside the new GMC pickup. WeÂ’re instantly drawn to the new center stack that doesnÂ’t even remotely look like the truckÂ’s current design. ThereÂ’s a new widescreen infotainment system integrated nicely into the dash just below new thin air vents. It appears to be running a version of Android Automotive. The Google Assistant bubble is visible in the top left corner, and a Google sign-in screen is showing on the far right. GMC is obviously still prioritizing hard buttons and knobs for all vital controls. A big, knurled-looking volume knob is positioned to the left of the screen. And the climate control layout is all buttons and knobs with glossy black and chrome accents. This, along with the angled surfaces, classes it up a bit versus the current sea of flat black center stack buttons. Even the push button start appears dressed up in chrome. One other large change to the center console area is the introduction of a gear lever replacing the column-mounted shifter. The new shifter looks slathered in leather, glossy plastic and chrome accents. ThereÂ’s a part of us that will miss the chunky truck-like operation of the column-mounted shifter, but this new design is certainly more befitting of a luxury pickup. And from what we can tell, this Sierra is the luxury-oriented Denali trim. Its exterior features give it away with the ostentatious grille treatment and chrome trim scattered about. We still donÂ’t know which, if any, of these features we see here will be exclusive to the Denali, but the digital instrument cluster seems like a given but will likely be available further down the trim tree. This replaces the truckÂ’s current, tired-looking gauges with a vibrant and neatly-integrated screen. Super Cruise, as it is throughout the lineup of GM cars that offer it, also looks optional — this Denali does not have the fancy light-up steering wheel or controls for it. ItÂ’s worth noting that this DenaliÂ’s interior could be different than the rest of the Sierra lineup. GM already did that with the redesigned Yukon, giving its top trim model a different look than the rest of the trims.

'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).