2008 Gmc Sierra 2500hd Slt Crew Cab Diesel 4x4 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!"

2013 GMC Acadia priced from $34,875*

For those who are interested in the reworked 2013 GMC Acadia, we now know how much you can look forward to forking over. Base MSRP for the 2013 version of the full-size, three-row crossover has been set at $34,875 (*not including a $825 destination charge). If you are interested in the range-topping Denali trim, be prepared to pay $46,770.
The 2013 Acadia will come standard with a backup camera, leather-wrapped steering wheel, USB port and recycled visuals from the now-dead Saturn Outlook.
Upping to the Denali trim gets you a head-up display, blind spot monitoring system and GMC's new Rear Cross Traffic Alert system. According to GMC, most trims will also receive IntelliLink connectivity as standard equipment. The Acadia will also get the industry's first front-center airbag, an innovation it shares with other Lambda-based crossovers like the refreshed 2013 Buick Enclave. The idea behind the new tube-shaped airbag is that it can provide a buffer between driver and front seat passenger in the event of an impact, or better hold the driver in place if he or she is alone.

11 vehicles from Barrett-Jackson Las Vegas worth watching

This weekend will see the world's collector car crowds descend on Las Vegas, NV for one of the biggest shows on Barrett-Jackson's popular auction circuit. There are hundreds of vehicles up for bidding, ranging from a brand-new Lamborghini Aventador to a spattering of Art Deco classics and a huge swath of classic muscle cars.
While it's virtually impossible to assemble an inarguable list of the best cars coming during the three-day, 700-plus vehicle auction, we've sifted through the listings for this year's show - it was a tough assignment, we promise - and assembled a list of what we think will be some of the most interesting lots. We'll admit, it's a bit heavy on American iron, but if you browse BJ's listings, you'll come to a similar conclusion. Still, scroll down for our list of what we think will be the most interesting vehicles at the upcoming auction.