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Next Corvette ZR1 to get 700 horsepower?

Word has it General Motors may offer as much as 700 horsepower in the C7 Corvette ZR1. Motor Trend reports the next Corvette Z06 will continue to rely on its naturally aspirated 7.0-liter V8 engine for thrust, but the lump will deliver substantially more power. How much more? MT says the engine could deliver up to 600 ponies. That's a jump of 95 horsepower over the current Z06, though no figures have been finalized as of yet. Right now, GM is reportedly waiting to see what sort of grunt it can glean from the next ZR1.
The automaker has already made it clear it will resurrect the LT5 name for the new supercharged V8, and if GM is already pulling 600 from the Z06, the big dog ZR1 would theoretically offer 700 horsepower. Either way, the range-topping Corvette will be suitably insulated from its less potent siblings. Stay tuned. We aren't likely to see the Z06 for at least a year, with the ZR1 trailing along at some point there after.

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.

GM Canada recalls 159,240 GMC and Chevy trucks for faulty defroster circuit

General Motors is recalling more than 159,000 2014-2019 Chevrolet Silverado and GMC Sierra pickup trucks in Canada due to a potential fire risk. GM says the rear defroster circuit could overheat on trucks optioned with the power-sliding rear window. Thus far, there is no word on the recall's relation to U.S. vehicles. The recall, found by Automotive News, was posted to Transport Canada on June 28, 2019 with manufacturer recall No. N192220470. Included in the 159,240 vehicles are the 2014-2018 Silverado 1500, the 2015-2019 Silverado HD, the 2014-2018 Silverado LD, the 2014-2018 Sierra 1500, the 2015-2019 Sierra HD, and the 2014-2018 Sierra LD. The notice says the rear defroster circuit, specifically on trucks with the power-sliding rear window, could overheat. Because of its placement, this excess heat could cause melting, smoking, or possibly fire, in the worst case scenario. As of now, there is no official word when GM will initiate the recall and there is no official fix detailed just yet. GM suggests that owners, who will be notified by mail if their vehicles are affected, take their trucks to a dealer to remove the rear window defroster fuse as a stop-gap.  Automotive News contacted GM to find out if the problem is also found in trucks sold in the United States, but no definitive statement was made, as the investigation is reportedly ongoing. We will update this space if American vehicles are found to be included in the problem.