Leasing & Financing Available on 2040-cars

Auto blog

Chevy's 6.6-liter Duramax is pretty much all new

To say there's a heated battle in heavy-duty pickups is an understatement, with Chevrolet, Ford, and Ram constantly trading blows of increased torque, horsepower, and towing capacity. The latest salvo is the revised, more powerful turbo diesel 6.6-liter Duramax V8 in the 2017 Chevy Silverado. It has 910 pound-feet of torque, an increase of 145, putting it nearly level with the Ford Super Duty. Here's a closer look at where those gains come from. How exactly did Chevrolet add all that torque plus 48 horsepower? The automaker essentially took a fine-tooth comb to the entire engine. Chevy says it changed 90 percent of the V8, and the cumulative effect of those small changes adds up to big increases. As you might guess, the turbocharger is updated. The larger unit features electric actuation of the variable nozzle turbine (VNT), and what Chevy calls a double axle cartridge mechanism that separates the VNT moving parts from the housing. That helps with heat performance as well, with a claim that the exhaust side of the turbo can run continuously up to 1,436 degrees Fahrenheit. Helping that cause are six exhaust gaskets made of Inconel - an nickel alloy that contains chromium and iron – and upgraded stainless steel for the exhaust manifold. Despite having the same cast iron cylinder block, albeit with some minor enhancements, the engine has new cylinder heads, pistons, piston pins, connecting rods, and crankshaft, which have all been upgraded to handle 20 percent higher cylinder pressures. Alongside the increase in pressure, Chevrolet also increased the cylinder head's structure with a honeycomb design. The pattern features high-strength aluminum with dual layer water jackets that not only improve strength, but also optimize water flow for better cooling. For 2017, the cylinder head also benefits from integrated plenum that aids the engine in getting more air under heavy loads. The cylinder head isn't the only component to get a minor update, as the pistons have a larger diameter pin for improved oil flow. The same detailed improvements has been bestowed to the humble connecting rods (second in our hearts only to the inanimate carbon rod). The new design has the bolts oriented roughly 45-degrees to the rod instead of parallel. The angle split design, as it's called allows for easier passage through the cylinder.

Watch GM's new pickup crash its way to five-star NHTSA ratings

General Motors has just scored a big win with its Chevrolet Silverado and GMC Sierra pickup trucks, acing the National Highway Traffic Safety Administration New Car Assessment Program. The two full-size trucks had already netted a five-star Overall Vehicle Score in their crew-cab variants, but the new testing certifies them as five-star trucks in both regular and double-cab bodystyles, so GM's trucks offer top ratings across the board.
"Our incredibly capable trucks have been engineered to be some of the safest," Gay Kent, GM's general director of Vehicle Safety and Crashworthiness said. "We've designed the vehicle structure, strategically placed high-strength steel and developed the occupant restraint system to achieve high levels of safety performance."
The scores mark the Silverado and Sierra as the first pickups to net five-star scores since NHTSA beefed up their testing regime in 2011, a nice feather in GM's cap as it continues to slug out the pickup truck wars with crosstown rivals Ford and Ram.

General Motors could turn Hamtramck into its electric pickup, SUV hub

Electric off-roaders could revitalize the Detroit-Hamtramck factory that General Motors previously announced it will close. While official details remain shrouded in secrecy, analysts believe the plant will be re-tooled to manufacture at least three electric models due out during the early 2020s. The plant's scheduled closure was one of the grievances the United Auto Workers (UAW) union cited when it embarked on a 40-day strike in September 2019. General Motors agreed to keep it open without shedding much light on what it planned to build there. Analyst at LMC Automotive told the The Detroit News they believe an often-rumored electric SUV that will resurrect Hummer's name, image, or both will be one of the models assigned to the Hamtramck plant. Battery-powered variants of the GMC Sierra and the Cadillac Escalade will be made there, too, as will an enigmatic van. LMC Automotive's Jeff Schuster believes the van will come first; it could enter production as early as 2021. The Hummer — which might also be offered as a pickup — will follow before the end of 2022, while the Sierra and the Escalade will both arrive in 2023. We're taking this report with a grain of salt, though, because only one of the aforementioned models has been announced by General Motors. Rumors of a Hummer resurrection emerged in the summer of 2019, just a few weeks before we heard unverified reports of a battery-powered variant of the next-generation Escalade. General Motors confirmed plans to enter the burgeoning electric pickup truck segment, which Ford, Rivian, and Tesla also have their sights on, but it hasn't detailed how or when. The van is a mystery. General Motors refused to comment on the report. It previously announced it will keep Hamtramck open, and invest $3 billion to build electric vehicles there. The investment will create 2,225 jobs. Inaugurated in February 1985, the Hamtramck factory has churned out a diverse selection of models over the past 34 years, including Cadillac's Eldorado, Seville, and Allante, the Oldsmobile Toronado, the Buick Riviera, and more recently, gasoline-electric Chevrolet Volt. General Motors announced plans to close Hamtramck in 2018, but it quickly backpedaled and extended its lease on life until 2020 by keeping the Chevrolet Impala and the Cadillac CT6 around for a few additional months.