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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:  

GM recalling 54k Cadillac SRX, HD pickup models

There are more recalls to report General Motors, but these latest actions pertain to newer examples of the Cadillac SRX, Chevrolet Silverado HD and GMC Sierra HD. With so much scrutiny on the company's recall strategy, GM is under increasing pressure to call in defective models more quickly, and it appears to be doing so here.
Here in the US, the automaker is recalling 50,571 Cadillac SRX crossovers from the 2013 model year fitted with the 3.6-liter V6 because the transmission control module programming can cause a three- or four-second lag in acceleration at low speeds. The explanation filed with the National Highway Traffic Safety Administration states, "if the following sequence occurs within two seconds: during an upshift from first to second gear (8-10 mph), the driver then brakes the vehicle to less than 5 mph, and then accelerates again," the delay can occur. According to Automotive News, the recall effects 56,400 vehicles worldwide, and the company is not aware of any crashes caused by the problem. The fix consists of a transmission control module (TCM) reflash.
In a separate recall, GM is repairing 51 Chevrolet Silverado HD and GMC Sierra HD pickups from the 2015 model year in the US. In vehicles with diesel engines and dual fuel tanks, the nuts that connect the fuel pipe to each side of the transfer pump between the tanks may be improperly torqued, which could cause a fuel leak. Obviously, this could be a fire hazard. The remedy is simply tightening the hardware. According to GM spokesperson Alan Adler, there have been no fires actually caused by the potential leak. "Only 21 of the trucks are in customer possession and they can be fixed anytime because there are no parts involved. The others are being fixed at dealerships," Adler said in an email to Autoblog.

2020 GMC Sierra Heavy Duty teased, and you better believe there's a huge grille

Chevrolet has shown us a few photos of its redesigned Silverado Heavy Duty, and today we score our first teaser of the GMC Sierra version of this truck. The most controversial feature of the Silverado HD has to be its massive grille, and the Sierra appears to be no different. Just from this photo of the face, we can already tell it's going to be as bold, some might say gaudy, as the Chevy. We'll have to wait awhile to see it all, though, as GM says the Sierra HD will be making its debut in the second half of 2019. It's no Supra teaser campaign, but this one is already starting out pretty early for a work pickup truck. As far as features and technical details go, mum is the word for now. However, we can assume the Sierra will be nearly identical with the Silverado HD powertrain-wise. We know two engines will be offered on that truck, one being a gasoline V8 and the other a Duramax turbodiesel V8 — the former will be mated to a six-speed automatic, while the latter gets the 10-speed auto. Even though it isn't out yet, the torque figure is already less than the Ram and Ford heavy duty trucks at 910 pound-feet from the diesel. The Ram Heavy Duty just revealed at the Detroit Auto Show scores a whopping 1,000 pound-feet of twist in the torque department. We'll know more about the Sierra HD when the Silverado HD presumably gets revealed with full details at the 2019 Chicago Auto Show at the beginning of February. One thing's for sure: If you want chrome and lots of it, you're gonna get it with the 2020 GMC Sierra HD. 2020 Chevy Silverado HD View 5 Photos Related video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.