Gmc: Yukon Sle Sport Utility 4-door 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!"

AEV-upgraded GMC Canyon AT4X, Chevy Colorado ZR2 appear in spy photos

As with the previous generation, it appears the 2023 Chevy Colorado ZR2 will be getting a special AEV version. Not only that, but its twin, the GMC Canyon AT4X will get one, too. And as these spy photos show, they'll have some additional off-road accessories included, as well as bigger tires. We'll start with the GMC Canyon. The first example of the truck without any camouflage is not quite fully upgraded like the camouflage vehicles. But it has one part not seen on the others: the AEV snorkel. 2023 Chevy Colorado ZR2 AEV Bison prototype View 13 Photos The two appear to be riding on larger Goodyear Wrangler Terrain MT tires. These look like 35-inch examples -- 2 inches larger than the biggest tires available on the ZR2 and AT4X. They're also mounted on beadlock capable wheels. Besides the bigger tires, both trucks also feature a new bed-mounted spare tire. It's a full-size spare, and unlike past bed-mounts, this one places the tire flush against the cab. The benefit of moving the spare to the bed is departure angle. And while this position looks a little less like how trophy trucks carry their spares, it should provide better cargo space. Rear visibility probably isn't great, though. Generalizing based on what we know about the current ZR2 Bison, the new AEV trucks will probably get unique grilles, steel bumpers, fender flares, a suspension lift and possibly even axle ratio changes. Additional options such as a winch could be offered, too. We expect the trucks will be revealed within the next year, since the base trucks have already been shown, and these are just upgraded versions of those trucks. Related Video: 2023 Chevrolet Colorado walkaround

GM recalling 8.4M cars, 8.2M related to ignition problems

General Motors today announced a truly massive recall covering some 8.4 million vehicles in North America. Most significantly, 8.2 million examples of the affected vehicles are being called back due to "unintended ignition key rotation," though GM spokesperson Alan Adler tells Autoblog that this issue is not like the infamous Chevy Cobalt ignition switch fiasco.
For the sake of perspective, translated to US population, this total recall figure would equal a car for each resident of New Hampshire, Rhode Island, Montana, Delaware, South Dakota, Alaska, North Dakota, the District of Columbia, Vermont and Wyoming. Combined. Here's how it all breaks down:
7,610,862 vehicles in North America being recalled for unintended ignition key rotation. 6,805,679 are in the United States.