2007 Gmc Sierra 2500 6.6l V8 Duramax Diesel Allison Automatic Crew Cab Short Bed on 2040-cars

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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.

Black Friday could power record November sales

Black Friday allows some shoppers to line up in the wee hours for doorbuster deals on laptops and TVs, but the day after Thanksgiving could mean huge profits for automakers this year, too. Multiple industry analysts predict record growth for the industry for November, and the upcoming incentives could help those numbers. TrueCar predicts that Black Friday incentives could provide a major boost, and it estimates a November sales jump of 3.9 percent from last year to a record for the month at over 1.35 million vehicles. As examples of potential deals, Chevrolet, Buick, and GMC plan to offer up to 20 percent off some models, and FCA US has no-interest financing for up to 75 months from its brands. "Consumers are excited about Black Friday promotions and these month-long events appear to be resonating with car buyers." Eric Lyman, TrueCar's vice president of industry insights, said in the report. Black Friday only recently became a big day for auto sales, according to an analysis from Edmunds. Last year, Thanksgiving weekend posted double the sales as any other weekend in the month. The company predicts a sales volume of over 1.33 million vehicles for November. If that happens, it would be the beat the previous record of 1.32 million sales for the same month in 2001. Some forecasts temper the gains for November but only slightly. Kelley Blue Book predicts flat year-over-year sales at 1.3 million vehicles, but that's largely because there are two fewer sales days in 2015 versus in 2014. "Black Friday deals on vehicles have grown in popularity in recent years, and should be a big contributor to this month's sales results," said analyst Tim Fleming in the study. The combined research from J.D. Power and LMC Automotive have the lowest November prediction among this group at just over 1.279 million sales for the month versus 1.299 million in 2014. However, once the researchers adjust the figures for the two fewer selling days, 2015 could actually be seven percent higher than last year. TrueCar Finds New Auto Sales in November to Reach Monthly Record Black Friday promotions bolster sales gains; industrywide incentives up 6% from last year November 24, 2015 12:11 PM Eastern Standard Time SANTA MONICA, Calif.--(BUSINESS WIRE)--TrueCar, Inc. (NASDAQ: TRUE) projects total new vehicle sales, including fleet deliveries, will reach 1,352,500 units in November, a 3.9 percent increase from a year ago and the highest ever for the month.

GM phasing out light-duty 1500-series vans

In the market for a fullsize van but don't need a heavy-duty model? You're in the minority, and you're also out of luck. That's because there are barely any more fullsize vans on the market with gross vehicle weight rating of less than 8,500 pounds, the threshold that separates light- and heavy-duty vans.
According to PickupTrucks.com, neither the Ford E-Series, Ram ProMaster, nor Mercedes-Benz Sprinter are available in light-duty versions. Few of the Ford Transit configurations are, either, and now General Motors is discontinuing production of the 1500-series Chevy Express and GMC Savana.
Apparently light-duty versions accounted for just 23 percent of Express sales and only 7 percent of Savanas. Add to that the fact that these 1500 versions were the only ones using the old generation of engines and suspension, and that the Wentzville plant near St. Louis, Missouri, is trying to make room for the next Chevy Colorado and GMC Canyon pickups, and the fate of the light-duty GM van was sealed.