Duramax 4x4 Compare To Powerstroke 7.3 Cummins 5.9 Chevy Fourwheel Drive on 2040-cars

Auto blog

GM diesel pickups first to undergo extra EPA, CARB testing

The effects of Volkswagen's long-running diesel emissions evasion are starting to spill over to other automakers, but General Motors is taking things in stride. The 2.8-liter, four-cylinder Duramax in the 2016 Chevrolet Colorado and GMC Canyon is the first engine to get extra scrutiny by the Environmental Protection Agency and the California Air Resources Board, Automotive News reports. Rather than just the usual in-lab test, it's also being checked on the road. However, the extra evaluation shouldn't have any impact on when the trucks with his mill hit dealers later this fall. "We're in our final stages of the EPA certification, and our launch is on track," Chevy spokesperson Otie McKinley tells Autoblog. The four-cylinder diesel in the trucks makes 181 horsepower and 369 pound-feet of torque, and the automaker is touting low NOx production. In the announcement for the Colorado's specs, the company calls it "the cleanest diesel truck engine ever produced by General Motors." The tech includes exhaust gas recirculation to lower combustion temperatures and improve emissions. There's also a urea tank like on the bigger diesels for full-size trucks, and it gets refilled in time with oil changes. An indication on the instrument panel lets drivers know when that's needed, too. Even with the more demanding testing, the company doesn't seem too worried about the four-cylinder passing. "Part of our development process is on-road and off-road [laboratory] testing," Scott Yackley, Chevy Trucks assistant chief engineer, said to Automotive News. In the wake of the VW scandal, the EPA has pledged more rigorous testing. Before, on-road emissions evaluations were largely limited to heavy-duty vehicles, but the agency has decided to apply the checks more often to other models. There's also now greater cooperation with Canadian authorities.

Pickup sales may hit 2M units for first time since 2007

Even as fuel prices creep back up, trucks are still a hot item among new-vehicle shoppers. To see how popular pickup trucks still are, you don't have to look any further than how much effort automakers put into the continual one-upmanship of their trucks. Backing this fact up, USA Today is reporting that the segment could top two million sales this year - a total not matched since 2007, though still far from the pre-recession, three-million-unit levels.
Through August, the Ford F-Series continues to be the segment leader with almost 500,000 units sold, but the Chevy Silverado (328,269), Ram 1500 (234,642), GMC Sierra (122,232) and Toyota Tacoma (110,293) are all seeing at least 20-percent sales increases, helping to account for around 1.44 million truck sales so far this year - not including possible outliers like the Suzuki Equator and Chevy Avalanche.
This year alone, General Motors has completely redesigned its fullsize trucks, Ram and Toyota have significantly updated their offerings, the next-gen Ford F-150 will be out next year and Nissan is promising an all-new Titan around the same time with an eventual Cummins diesel under the hood. It would seem, then, that truck sales are poised to continue their upward trend.

GM considering new powertrain options for large SUVs

Aside from the new General Motors offerings, there's not a whole lot of action going on in the fullsize SUV segment. That doesn't seem to be stopping GM from pushing the envelope in the market as Automotive News is reporting that the automaker is looking to introduce some new powertrain options into the Chevy Tahoe (and Suburban), GMC Yukon (and Yukon XL) and the Cadillac Escalade - all have been redesigned for the 2015 model year.
Now, we already know that GM and Ford are collaborating on nine- and ten-speed transmissions for a broad range of applications (including the big SUVs), but this new report says that GM is also considering other options as a way to one-up the competition and, of course, to optimize fuel economy. AN quotes Jeff Luke, executive chief engineer for GM trucks, as saying that "interesting powertrain technologies" are coming including a return of a hybrid SUV and possibly even a diesel engine. Although it sounds like the latter could come down to how customers respond to the 2014 Jeep Grand Cherokee EcoDiesel.