2020 Gmc Sierra 2500 At4 on 2040-cars

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GM recalling 250,000 SUVs over door electronics

After a door-fire investigation that dates back to February, the National Highway Traffic Safety Administration has officially announced a recall today that affects around 250,000 General Motors SUVs for a faulty driver's door module. The recall applies to the Buick Rainier, Chevrolet Trailblazer, GMC Envoy, Isuzu Ascender and Saab 9-7X from the 2006 and 2007 model years, as well as the 2006 Chevrolet Trailblazer EXT and GMC Envoy XL for vehicles sold and/or registered in the Snow Belt.
Road salt use in these midwestern and northern states can lead to corrosion of the driver's door module on these GMT360 and GMT370 vehicles, which allows water to come in contact with the circuit board. If shorted out, the vehicle's power door locks and power windows will not work, and could possibly lead to overheating and, in some circumstances, a fire. No official word on how many total vehicles caught on fire, but back in June, 28 fires had been reported to the government agency. A fix for the problem is still being worked out, but all affected vehicle owners will be notified by GM.
Scroll down for the official NHTSA statement.

GMC explains why the Hummer EV SUV has only 830 horsepower

GMC's 2022 Hummer EV pickup made its debut in late 2020 with a headline-grabbing 1,000-horsepower rating. Its SUV sibling broke cover yesterday with 170 fewer horses, so GMC executives had some explaining to do. Al Oppenheiser, the EV's chief engineer, pointed out that the SUV's wheelbase is about nine inches shorter than the truck's, which is called an "SUT" in GMC-speak. It's also about 20 inches shorter overall. Size matters in the electric car world; GMC can't stuff the SUT's big battery pack in the more compact SUV, and this directly influences power. He added that it would have been possible to build a 1,000-horsepower SUV by making changes to the battery pack's layout. His team would have needed to reduce cargo capacity and get rid of the flat loading floor, which were compromises that engineers were not prepared to make. Ultimately, 830 horses should be plenty for most drivers. "Frankly, we are not sorry that it's only 830 horsepower. There aren't many internal combustion engines that can say that. Will we be able to grow horsepower in the future? We are going to push that capability, and as the technology gets to the point where our batteries are smaller and more efficient, we will improve performance with any chance we get," Oppenheiser said. It helps that the Ultium battery technology GMC uses is extremely modular. Less powerful versions of the Hummer SUV are in the cards, too. At launch in early 2023, the model will exclusively be offered with the aforementioned 830-horsepower drivetrain, which offers around 300 miles of driving range. Pricing will start at $105,595 before options are factored in. Several months later, GMC will release an EV2X variant with up to 625 horsepower, about the same amount of driving range, and an $89,995 price tag before incentives. Related video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. GMC Hummer EV reveal

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!"