2004 Gmc Yukon Denali Sport Utility 4-door 6.0l on 2040-cars

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Diesel Power finds the ultimate modified oil-burner

For nine years, Diesel Power magazine has run the Diesel Power Challenge, this year's grindfest being "a week-long torture test that features seven events, nine trucks, 8,000 horsepower, and nearly 15,000 pound-feet of torque." The road to being crowned "the most powerful truck" starts with a dyno run, and then continues through the completion of a CDL-style obstacle course, an eighth-of-a-mile drag race while towing a 10,000-pound trailer, a quarter-mile drag race without a trailer, a fuel economy test in the mountains and finally a sled-pulling test through a 300-foot-long packed-mud pit.
What kind of trucks get into such a fight? Last year's winner, for instance - who upgraded his truck this year to prove he didn't "luck into the win" - drives a 2008 Ford F-250 Super Duty with a 6.4-liter Power Stroke V8 upgraded with a custom intake, Elite Diesel triple turbos and a two-stage nitrous system. Another competitor has a 2005 Dodge Ram 2500 powered by a 5.9-liter Cummins inline-six, upgraded with Garrett turbos, dual-stage nitrous, a seven-inch exhaust stack and twin fans built into the bed to cool the Sun Coast Omega transmission. The numbers on that truck: 1,255 horsepower, and 2,063 pound-feet of torque at the wheels. Naturally, as the image above might suggest, things don't always end well.
You'll find all five videos covering this years challenge below. A scene in the dyno video sums it all up perfectly: a competitor leaves his nitrous on too long and the crew is treated to some ominous poppings, he leans out the window, throws both hands up and shouts, "Amer'ca!"

2024 GMC Canyon AT4X AEV Edition First Drive Review: The business-class Bison

McALLISTER, Mont. – Not far from MontanaÂ’s Ramshorn Peak is a beautiful body of water known as South Meadow Creek Lake. It sits just a hair below 9,000 feet and offers beautiful views of the surrounding highlands and — if youÂ’re lucky and the lighting is just right — a clear line of sight to Big Sky Country. To hear the locals tell it, you canÂ’t get there in a pickup truck. Apparently, to a GMC engineer, that comes across as an open challenge. And so I found myself in the two-horse town of McAlllister (not far from Bozeman), chilly in the fog of an early October morning, inspecting a line of GMCÂ’s midsize trucks in their hardest of hardcore variations. One half of the fleet was made up of the standard 2023 Canyon AT4X finished in a beautiful scarlet red; the other half, 2024 Canyon AT4 AEV Editions in a menacing gray that matched the dreary morning sky. Yep, that AEV. The Canyon AT4X is an already-capable little trail monster with all the off-road bells and whistles you could possibly ask for. ItÂ’s a virtual mechanical twin to the new Chevrolet Colorado ZR2, in fact, down to the 2.7-liter four-cylinder that produces 310 horsepower and a whopping 430 lb-ft of torque. Naturally, American Expedition Vehicles managed to turn that dial up to 11. More on that later. Canyon AT4X 3 View 32 Photos To the locals' point above, off-road trucks have existed for quite some time (just ask Marty McFly), but it has only been since their rise in popularity as mainstream commuters that the dedicated four-wheelinÂ’ pickup has really come into its own. The “you canÂ’t get there from here” Maine attitude at Bozeman latitudes betrays somewhat old-school notions about four-wheeling — and the fact that just about everybody in town owns some sort of ATV or side-by-side. The formula used to be pretty simple: You take the shortest SUV frame youÂ’ve got, add big stick axles to the front and rear, and then jack the thing up as high as you can without it falling over at the first sign of an incline. TodayÂ’s torque-monster engines have turned that on its ear. More torque means you can turn bigger tires, and what do bigger tires do? Well, among other things, they lift your truck off the ground. Shove enough tire under a truck and no matter where youÂ’re talking about, you can indeed get there from here. At its core, AT4X isnÂ’t groundbreaking.

GMC and AEV reveal Sierra Grande upfit SEMA concept

If there was any question as to whether GMC was dedicating resources to its off-road models, it was dismissed the instant American Expedition Vehicles entered the conversation. The two have already partnered to produce a GMC-branded alternative to the Chevrolet Colorado ZR2 Bison. The 2024 GMC Canyon AT4X AEV Edition is midsize pickup perfection, but the collaboration is far from over. With GMC now pushing the AT4X package on its heavy-duty pickups, AEV is looking for ways to explore the space.  "The Sierra Grande Concept represents AEV’s creative vision of how the company would further elevate the adventure-ready foundation of the GMC Sierra HD AT4X into a legendary overlanding rig," AEV said in its announcement The Sierra Grande is all Sierra HD AT4X underneath. The steering knuckles, control arms, rear suspension and butter-smooth DSSV dampers are all lifted directly from the production truck. This SEMA-bound concept is the quintessential upfit smorgasbord, boasting everything from add-on lighting to upgraded underbody protection. There are even two winches — one for the front and one for the back. If you ask us, they should have gone ahead and put one on each side too.  The snorkel pairs nicely with the 40-inch BF Goodrich tires, and the onboard air system guarantees you're never in a pickle when you hit pavement to head home. The bed is aluminum, but the skid plates are stamped steel (as is the brush guard). The front winch is rated for 12,500 pounds; the rear for "just" 9,500.  Unlike the Canyon AT4X AEV Edition, the Sierra Grande is merely an exercise — for now, anyway. We suspect that GMC has plenty more in store for its off-road trucks.  Related video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.