White Sle Suv 4.2l 4wd 4x4 Local Trade 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!"

2015 GMC Yukon Denali

Automotive enthusiasts often wonder aloud - ourselves included - why General Motors would choose to keep GMC while sending Pontiac (and Saturn, and even Oldsmobile before it) into the great automotive graveyard in the sky. The answer, as is so often the case, is profit. It's much easier for GM to rake in money hand over fist by rejiggering the trucks, crossovers and SUVs that it would already be developing for Chevrolet and making them a bit more luxurious and *ahem* "Professional Grade" with new grilles, badges and unique packaging for GMC.
While it may sound like we're being cynical, we totally approve of GM's fullsize SUV strategy. The least-expensive way to get into the fold is with the Chevrolet Tahoe, which starts at $45,595 with a 5.3-liter V8 engine and a cloth interior. Bumping that same Chevy to LTZ trim and its $59,995 sticker price lands a much nicer leather-clad interior and more techno-bells and whistles than you can shake a stick at. But it still looks like a Tahoe, and it still comes with the smaller 5.3-liter engine. Or, you could do what we'd do: Walk into your GMC dealer and take a look at the Yukon Denali. Here's why.
Driving Notes

GMC Terrain adds AT4 trim, completing the set

"AT4 all of the things!" is GMC's new rallying cry, as the brand has announced that the off-road-themed trim level is coming to the GMC Terrain midsize SUV. The Terrain will join the just-announced 2021GMC Yukon and the 2021 GMC Canyon midsize pickup, both of which add an AT4 variant for the first time. The model designation was introduced on the Sierra full-size pickup for 2019, and spread to the Sierra HD and to the Acadia three-row crossover for 2020. AT4 content, however, varies widely by model. In the Sierra full-size pickup, the trim level brings a full slate of off-road gear including a two-inch suspension lift, a two-speed transfer case for the 4WD system, a locking rear differential, hill-descent control, Rancho shocks, skid plates, off-road tires, and more. The Acadia AT4, meanwhile, includes little more than standard AWD, black wheels and exterior trim, and all-terrain tires. It sounds like the Terrain AT4 will be closer to the Acadia in execution, with GMC promising a black-chrome grille and exterior design elements plus "confident capability and advanced technology." Hmm. The GMC Terrain AT4 doesn't arrive until the 2021 model year, which means this fall, so more specifics, including pricing, are still to come. But GMC couldn't wait to show the Terrain AT4, which completes the AT4 family photo seen above. Related Video: