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GMC Sierra AT4X reportedly on the way, nameplate could be GMC's ZR2

In 2016, GM filed an application with Mexico's Institute of Industrial Property to reserve the name AT4X, and in 2019, the automaker made the same request to the U.S. Patent and Trademark Office. Seeing that GMC's current AT4 trim replaces the former All Terrain trim used on the last-gen Sierra pickup, there have been suspicions ever since those trademark filings that GM would use the AT4X name to replace GMC's former All Terrain X trim. GM Authority reports that this is precisely what's going to happen, citing "sources familiar with the matter." The outlet even gleaned an equipment group number: 4SG for AT4X, whereas AT4 is equipment group 4SB.  The surmise is that GMC is again developing its versions of Chevrolet's dirt-clobbering pickups that wear the ZR2 name. Spy shooters caught the GMC Canyon earlier this month trotting around on Multimatic's DSSV dampers and a set of 33-inch tires like its Colorado ZR2 sibling. The Canyon already offers an AT4 trim, it's thought this beefier setup will roll into the lineup as an AT4X.  Stepping up to the half-ton league, at the end of last month Chevy released a teaser for the Silverado ZR2, which had been caught in prototype guise (pictured at top) around Detroit on at least two occasions. We've mused that the production Silverado ZR2 could take some hardcore off-roader cues from the factory-upgraded Silverado ZR2 race truck like a lifted stance, long-travel front suspension, four-leaf springs instead of three-leaf, electronic locking front and rear differentials, and a wider track. One of the production prototypes was caught on 33-inch tires, but we wouldn't be shocked to see 35-inchers on the spec sheet. That size would match the race truck and the rubber fitted to the cross-town rivals Ford Raptor and Ram 1500 TRX. A GMC Sierra AT4X would be the plusher, pricier, chrome-ier version of the ZR2. The aforementioned Multimatic shocks could also be on the docket. We'd expect the GMC Sierra AT4X to bow with the heavily updated 2022 pickup, whenever that arrives. Events around the world of late delayed the pickup, its launch now thought to happen late next year or in early 2023. Related Video:  

'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).

Man on meth steals truck (and goat) from adult video store, police say

A man who was allegedly high on methamphetamine carjacked a pickup truck with a sleeping passenger inside it and a goat in the bed, pistol-whipped the passenger and then led police on a low-speed chase before finally being caught on foot and arrested, police say. It began early on New Year’s Day outside an adult video store in Carthage, Missouri, which is near Joplin in the stateÂ’s southwestern corner. Reports say Brandon Wayne Kirby, a 40-year-old from Mannford, Oklahoma, stole the truck after the driver had gone inside the store but while the passenger was sleeping. When the passenger woke up, he saw a masked man driving and pointing a gun at his head. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. Police say Kirby drove the GMC Sierra Heavy Duty Duramax diesel through parts of Missouri, Kansas and into Oklahoma, holding the passenger against his will. At some point, the passenger told police, Kirby ingested meth, pistol-whipped him and continued to threaten him with the gun. The passenger said Kirby eventually let him and his pet goat out on the side of the road in a rural area, which is when he was able to call 911. Police then called OnStar, which tracked down the stolen Sierra HD and slowed it down to around 15 mph. Police eventually used stop sticks to flatten the truckÂ’s tires in the city of Sand Springs and later had to nudge the truck into a ditch to end the low-speed vehicle chase. But Kirby at that point got out of the truck and fled on foot through the woods, dropping his mask and gun, which were both later recovered by police. Kirby was jailed and had charges listed as kidnapping, pointing a firearm and being a felon in possession of a firearm. HeÂ’s reportedly wanted in another county in Oklahoma for burglary and has multiple felony convictions for assault, burglary and possession of a stolen vehicle, according to KTUL-TV in Tulsa. The passenger and goat were transported back to the Creek County SheriffÂ’s Office. The Sand Springs Police Department said on Facebook: “OK 2020, it only took you 4.5 hours to get weird. Let's slow down on the carjacking-goatnapping calls for the remainder of the year.” Related Video: