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2023 GMC Sierra AT4X could swipe a few parts from the AT4X AEV

GM recently expanded its collaboration with American Expedition Vehicles beyond the Bison herd with the 2023 GMC Sierra AT4X AEV. This Jimmy takes matters further than the standard AT4X by increasing ground clearance, approach and departure angle, and breakover angle, improvements made possible by new stamped steel bumpers and a set of 33-inch mud-terrain tires wrapping 18-inch AEV Salta wheels. GM Authority says the AT4X AEV won't be the only Sierra to get special parts, crediting sources for the news that the standard 2023 Sierra AT4X will get some of the equipment from the special trim. According to the report, at some point for the coming model year, the off-road-focused Sierra will bolt on the AEV's stamped steel front and rear bumpers, stamped steel front skid plate, and 33-inch Goodyear mud terrains. If this is true, it's an intriguing move; the equipment list is nearly everything found on the proper AEV model. Going by that list, the only bits left off would be four additional skid plates, wheels, gloss black door handles, gloss black tailgate accent, and AEV logos. Judging from the GMC retail website, the grille that debuted on the AT4X AEV will also be on the standard AT4X.  GMC hasn't announced pricing for the 2023 range yet. The pickup will be carryover, but we would expect various well-known issues to increase the $78,300 price of the regular AT4X over the 2022 model. GMA believes "it's reasonable to assume" that a standard 2023 Sierra AT4X with some AEV parts would go up even more, whenever it hits the market — and this is on top of the Sierra's $1,500 price increase from making OnStar standard equipment. And after that, of course, the proper AT4X AEV would be more again.

Chevy's 6.6-liter Duramax is pretty much all new

To say there's a heated battle in heavy-duty pickups is an understatement, with Chevrolet, Ford, and Ram constantly trading blows of increased torque, horsepower, and towing capacity. The latest salvo is the revised, more powerful turbo diesel 6.6-liter Duramax V8 in the 2017 Chevy Silverado. It has 910 pound-feet of torque, an increase of 145, putting it nearly level with the Ford Super Duty. Here's a closer look at where those gains come from. How exactly did Chevrolet add all that torque plus 48 horsepower? The automaker essentially took a fine-tooth comb to the entire engine. Chevy says it changed 90 percent of the V8, and the cumulative effect of those small changes adds up to big increases. As you might guess, the turbocharger is updated. The larger unit features electric actuation of the variable nozzle turbine (VNT), and what Chevy calls a double axle cartridge mechanism that separates the VNT moving parts from the housing. That helps with heat performance as well, with a claim that the exhaust side of the turbo can run continuously up to 1,436 degrees Fahrenheit. Helping that cause are six exhaust gaskets made of Inconel - an nickel alloy that contains chromium and iron – and upgraded stainless steel for the exhaust manifold. Despite having the same cast iron cylinder block, albeit with some minor enhancements, the engine has new cylinder heads, pistons, piston pins, connecting rods, and crankshaft, which have all been upgraded to handle 20 percent higher cylinder pressures. Alongside the increase in pressure, Chevrolet also increased the cylinder head's structure with a honeycomb design. The pattern features high-strength aluminum with dual layer water jackets that not only improve strength, but also optimize water flow for better cooling. For 2017, the cylinder head also benefits from integrated plenum that aids the engine in getting more air under heavy loads. The cylinder head isn't the only component to get a minor update, as the pistons have a larger diameter pin for improved oil flow. The same detailed improvements has been bestowed to the humble connecting rods (second in our hearts only to the inanimate carbon rod). The new design has the bolts oriented roughly 45-degrees to the rod instead of parallel. The angle split design, as it's called allows for easier passage through the cylinder.

2021 Chevy Colorado and GMC Canyon facelift spied

The Chevy Colorado and its GMC Canyon twin have been on sale for a good long time now, and while things move a little more slowly on the truck side when it comes to facelifts and model changeovers, it seems like it’s about time. So itÂ’s no surprise to see some lightly camouflaged trucks running around ahead of what appears to be a minor refresh for the 2021 model year. Starting with the Colorado, it appears to have a bowtie hiding behind some camo in the center of the grille, which otherwise looks like the no-bowtie option you can get on 2019-and-up trucks. It could be that Chevy is keeping the no-bowtie grille design but allowing a bowtie to grace it, or it could be misdirection. Either way, the grille pattern adds a bit of flair to the otherwise staid front end design. There also appears to be a bit more shape to the lower air inlet, with echoes of some of the lower fascias of its bigger Silverado stablemate. The Canyon, on the other hand, shows more extensive front-end changes. At first glance, it looks to emulate some variants of the GMC Sierra, which would make sense given those modelsÂ’ changes for the 2020 model year. In particular, this Canyon has hints of Sierra HD, being more square and monolithic than the regular Sierra 1500s, although itÂ’s a little hard to tell with the camo covering the edges of the grille. It could certainly also adopt more rounded corners like the 1500s. Either way, itÂ’s more vertical and thereÂ’s less differentiation between the upper grille and lower opening. ThereÂ’s nothing in the way of changes around the sides or back, and while there may be some minor changes inside, we arenÂ’t expecting any. The word around town is that this isnÂ’t a full facelift, but rather a minor front end tweak thatÂ’ll just be a regular part of the model-year changeover.