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Leaked GM document shows GMC Sierra I6 diesel is more powerful than F-150's

GM told us earlier this year that the 2019 GMC Sierra would be getting a 3.0-liter I6 diesel option, but it never mentioned power or fuel economy figures. Hold the phone though, because a leaked GM Canada document just showed up online that lists out the details we've been waiting for. Originally published by TFL Truck, the 3.0-liter oil-burner supposedly makes 282 horsepower and 450 pound-feet of torque. For those who are counting, that's more than the Ford F-150's 250 horsepower and 440 pound-feet from its 3.0-liter diesel. It soundly bests the 240 horsepower and 420 pound-feet of torque from Ram's 3.0-liter diesel as well. Fuel economy is another story, though. The promotional material states that it will get 28 mpg on the highway, which is 2 mpg short of the F-150's 30 mpg — mind you, it's only capable of that magical 30 mpg figure in rear-wheel drive form. There's another caveat here, too; these are numbers for Canada, so they're not exactly finalized EPA figures. However, we wouldn't expect drastic differences between the two when the American numbers come out. The leaked documents also state the diesel Sierra will be capable of towing 7,800 pounds. That number seems remarkably low when compared to the F-150, which can tow up to 11,400 pounds with its diesel. Extra power and torque would have us assume that GM could get even better numbers than Ford, so we're going to hold our final judgment for official word. A 10-speed automatic will do the shifting on the diesel, just like on the 6.2-liter V8. Since the Chevy Silverado is also expected to get this engine, we can assume the figures would be almost, if not identical, to those we see here. We recently drove the 2019 Sierra and Silverado without the diesel engines, so go check those reviews out if you'd like to know more of our thoughts on the redesigned GM trucks. Related video:

Weekly Recap: Electric Rapide concept showcases Aston's future

Aston Martin showed off an all-electric Rapide S prototype this week and announced an agreement with investment firm ChinaEquity to explore development of a production version of the sports sedan. The car could arrive in about two years if the project advances, and it would be built in Gaydon, England. The concept car, called the "RapidE" was developed with Williams Advanced Engineering. The electric Rapide is meant to highlight British innovation, and it was revealed during a state visit by Chinese president Xi Jinping to the United Kingdom. Spec were not available for the concept on display. "The car we showed in London is a fully running concept but not yet defining [of] our choice of battery, motor, inverter, etc," spokesman Simon Sproule said. "Now that we have a clearer path for producing the car, we will be defining all the parameters." Aston Martin has been vocal about its electric ambitions this year, and Sproule told us at the New York Auto Show that an all-electric Rapide could cost $200,000 to $250,000 or more. "It's a study, but we're serious about it," he said. Some reports have indicated the electric Rapide could pack as much as 1,000 horsepower. Aston considers electric technology the strongest play for modernizing its powertrains and meeting emissions standards around the world. Hybrids and all-electric models can offer high outputs and strong torque delivery, which is in keeping with the Aston's image as a sportscar maker. Company brass prefer this option over dropping down to four-cylinder engines. And yes, V8s and V12s remain part of the plan. The electric push is part of Aston's future strategy to remake its lineup, which includes refreshing its sportscars, building a production version of the electric all-wheel-drive DBX concept shown at the Geneva Motor Show, and adding a four-door Lagonda. OTHER NEWS & NOTES Domino's serves up purpose-built delivery car Domino's revealed a purpose-built pizza delivery car based on the Chevy Spark. It's called the DXP, for Delivery Expert, and it can handle up to 80 pizzas. The pies stay warm thanks to an oven located behind the driver's seat, and the DXP is sauced up with a puddle-lighting feature that projects the Domino's logo outside of the car. Power comes from the Spark's stock 1.2-liter four-cylinder engine rated at 84 hp that gets up to 39 mpg on the highway. Chevy dealers will be trained to service the DXP.

First 2015 Chevy Corvette Z06 engine blows up at just 891 miles

You've waited and watched and waited some more for the arrival of your 650-horsepower, $78,000 Chevrolet Corvette Z06. Finally, that joyous day arrives and you eagerly, but gingerly, begin to break-in the 6.2-liter supercharged V8 monster under your hood. Then 900-odd miles after delivery, your excitement grinds, quite literally, to a halt. That's what the owner of one 2015 Z06 claimed happened to him when a simple break-in drive resulted in a lunched engine. The owner, known as Lawdogg149 on Corvette Forum, says he was out breaking-in his car ahead of a January track event when it happened. "While making a pull from 35 miles per hour, I accelerated and shifted short of redline, and boom - the car began knocking. I pulled over and popped the hood. I could hear a loud knock coming from the No. 6 cylinder area along with a serious, grinding, metal-on-metal sound coming from the supercharger area," Lawdogg wrote. A subsequent trip to the dealer confirmed his concerns, with the service facility telling Lawdogg that the No. 6 valvetrain had failed. The dealer couldn't research the issue further, though, as General Motors requested the engine be returned for a more thorough evaluation. The good news for the Z06's unlucky owner, at least, is that GM will be covering the engine replacement under warranty, an expense that Corvette Forum estimates is a nearly $24,000 procedure. At this point, the two leading theories behind the engine's detonation involve a manufacturing defect – which could be why GM is so keen to tear the blown powerplant down – or a mistake on the part of Lawdogg. As Motor Authority points out, such an error could be something as simple as the Z06's owner accidentally shifting to first rather than third during his 35-mph pull. If, however, there's a deeper manufacturing problem with the Z06's engine, this might not be the only case we end up hearing about.