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GM delays 3.0-liter Duramax diesel in Silverado and Sierra pickups

Stricter testing protocols around the world are making it harder for automakers to predict launch timelines. GM is the latest to get caught in emissions nettles, the Detroit carmaker forced to delay the launch of its new Duramax 3.0-liter inline-six diesel for the Chevrolet Silverado 1500 and GMC Sierra 1500. That's what company reps told dealers in a memo seen by Automotive News this week. Dealers and buyers had been promised the Flint, Mich.-built oil-burner in early 2019, but AN wrote that the EPA certification hiccup has turned into a "slight delay." A GM spokesman told Motor1, "[We] did not attribute [the delay] to a single entity, as the truth is this is a collaborative effort between GM and several government entities. We will make the 2020MY Duramax available for dealers orders soon, and expect to deliver the first trucks to customers soon after emissions testing is complete." We know the new 3.0-liter Duramax diesel has 277 horsepower and 460 pound-feet of torque, outdoing Ford's 3.0-liter PowerStroke diesel by 27 hp and 20 lb-ft. But without final EPA paperwork, GM can't release the numbers that will show how the two engines stack up when considering fuel economy and tow ratings. The certification process has been sticky for a few other makers of late, especially since the Volkswagen Group situation in 2015. BMW had to delay the launch of four diesel models in 2016 over EPA testing. The new Ram 1500 dribbled out in a trickle last year for reasons thought to deal with EPA testing, coming as it did a year after the EPA investigated Ram's EcoDiesel engines in 2017 and 2018. More recently, WLTP testing in Europe caught out just about every automaker over there. Since we're almost halfway through 2019, the delay until the 2020 model year is only a few months. Still, GM told dealers to cancel any orders for the engine for this model year. Dealers will need to resubmit the orders once opening begins, but GM hasn't said when production will begin other than "soon." The company said that it will offer 2020-model-year replacement vehicles to customers and dealers. If prices hold into the next model year, the 2020 Silverado 1500 and Sierra 1500 with the inline-six diesel will come at a $3,890 premium over the 2.7-liter turbo four-cylinder, and a $2,495 premium over the 5.3-liter V8.

Next-gen Chevy Camaro ZL1 teases big changes under its camo

With work complete on the lighter, stiffer 2016 Camaro, it's time for Chevrolet's engineers to really start having fun by developing the next, ZL1 version. Here it is for the first time. Unfortunately, the muscle car is still wearing quite a bit of camouflage, but the concealment isn't enough to hide some of the meaner model's more obvious performance tweaks. Starting from the front, this Camaro now wears a much more aggressive front fascia with bigger air inlets. Managing the airflow around the engine bay is clearly a big deal because another photo reveals a fairly large extractor in the hood, as well. Moving down the profile, the lower side sills and orientation of the camo suggest some blistered fenders in the back to cover wider rubber, and at the very rear a much larger wing further suggests the need to keep things planted to the road. Check out the comparison images in the gallery for a better look at the tweaks. What will power the next ZL1 is still entirely a mystery, although sticking with a supercharged 6.2-liter V8 could be a possibility, especially if you take the big extractor in the hood as a hint. Whereas the current ZL1 makes 580 horsepower and 556 pound-feet of torque, the LT4 in the latest Cadillac CTS-V pumps out 640 hp and 630 lb-ft. Combined with the Camaro's other improvements, we're thinking that this new ZL1 will be quite a hot ticket, and based on these spy shots, we can't wait to find out.

2015 Chevy Colorado takes Motor Trend Truck of the Year calipers [w/videos]

The final winner of Motor Trend's prestigious Golden Calipers has been named, with the 2015 Chevrolet Colorado taking the title of 2015 Truck of the Year, likely shocking those who thought Ford's all-aluminum, next-generation F-150 would take the crown. But win the Colorado did, beating not only the new Ford, but two other brutish Blue Ovals in the F-450 and Transit. The midsize pickup also bested its brethren from General Motors, beating the heavy-duty Chevy Silverado 3500, GMC Sierra Denali 2500 and the GMC Canyon, the Colorado's fraternal twin. After an unprecedented two-year stint with the Golden Calipers, Ram sat this year's awards out. Most impressive about the Colorado's victory isn't that it simply beat the US market's other trucks, it did so with a unanimous vote. Praise from MT's editors focused on the trucklet's price, spacious interior, fit and finish and performance. Former Autoblog staffer Jonny Lieberman called the Colorado's steering the best he'd "ever experienced on any truck, full stop," in MT's awards article. "After days of testing, hundreds of miles on the road, and our most rigorous truck testing program to date, our editors unanimously selected the Chevy Colorado as our 2015 Truck of the Year," said MT boss Edward Loh. "Colorado is a smart, capable, and refreshingly honest truck that makes a strong value and efficiency statement. It's perfectly sized and suited for the needs of many of today's truck users." The Colorado joins the 2015 Volkswagen Golf and 2015 Honda CR-V among Motor Trend 2015 award winners. Scroll down for video commentary from General Motors CEO Mary Barra, Loh and a clip of the Golden Calipers being handed over. Also, check out GM's full press release on its big win. The video meant to be presented here is no longer available. Sorry for the inconvenience. The video meant to be presented here is no longer available. Sorry for the inconvenience. The video meant to be presented here is no longer available. Sorry for the inconvenience. MOTOR TREND Names Chevrolet Colorado 2015 Truck of the Year Midsize pickup outclasses competition in design, engineering, efficiency, safety and more 2014-12-03 EL SEGUNDO, Calif. – After its most comprehensive truck evaluation program in history, MOTOR TREND has selected the Chevy Colorado as its 2015 Truck of the Year®. MOTOR TREND's Truck of the Year program is only open to all-new or significantly updated trucks and vans for the upcoming model year.