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2020 GMC Sierra gets small price bumps, package discounts and tweaks

A couple of months ago we covered a brace of changes GMC made to the 2020 Sierra 1500. Those included availability of the 2.7-liter turbocharged four-cylinder with 310 horsepower and 348 pound-feet of torque, the 5.3-liter V8 getting the 10-speed automatic transmission, the CarbonPro Editions debuting for AT4 and Denali trims, and a new bed view camera. But GMC has made a few more smaller changes throughout, as GM Authority found, part of a detailed overhaul among GM's pickup lines that's already changed trim names, trim volume, and prices on the Chevrolet Canyon and GMC Colorado. We'll start with MSRP adjustments on the 2020 Sierra: 4WD drivetrains in SLT, and the AT4, and Denali trims that only come in 4WD, see a price increase of $200. There are also more MSRPs to consider this year, with a handful of new Elevation models filling price gaps.  The only changes inside are AT4-logoed all-weather floor liners that come standard for that trim, and adaptive cruise control joining the Driver Alert Package II available on the SLT, AT4, and Denali trims. Speaking of packages, the Value Packages represent truth in advertising. The new base-model Sierra Sierra Value Package costs $860 to combine the Convenience Package and Trailering Package. Those two cost $1,640 when ordered separately. Sticking with the base trim, the Chrome Exterior Package disappears because the chrome bumpers it added are now the standard finish. Black bumpers front and rear can be ordered at no charge, and the 17-inch Bright Silver painted aluminum wheels can be ordered alone. One trim up, the SLE Value Package lumps Convenience and Trailering, too, but it only costs $380, which is $15 less than the Trailering Package by itself. The Elevation Value Package gets cut by $1,330 to $585. On the AT4 trim, GMC dropped the price of the CarbonPro Package from $1,060 to $560, and the Premium Package comes down by $500 as well. The same $500 discount applies to the SLT Premium Package. The new 2.7-liter turbocharged four-cylinder is the optional engine on the base, SLE, and Elevation trims, saving $235 on the first trim and $395 on the other two compared to ordering the standard 4.3-liter EcoTec V6. Smokey Quartz Metallic exterior paint is expected to disappear come Q2. Two new wheels enter the range in the upper reaches, one being a 20-inch Carbon Grey painted rim available on the AT4 CarbonPro Edition.

GM 6.2L V8 claims most powerful light-duty truck engine title

General Motors has officially captured the horsepower crown for mainstream pickup trucks with its 6.2-liter V8. The big mill, available in both the Chevrolet Silverado and GMC Sierra, comes to market with 420 horsepower and 460 pound-feet of torque, handily outdoing its two cross-town competitors, Ram (5.7-liter V8, 395 ponies and 407 lb-ft) and Ford (6.2-liter V8, 411 hp and 434 lb-ft).
The new GM 6.2 will take a bit of an investment, though. Those that want the extra thrust will need to go with either the LTZ or High Country trims from the Chevy, or the SLT and Denali trims from GMC, which are the two highest trim levels for the respective vehicles. Trim levels aside, if you're in the business of towing, GM has you covered. Optioned with the 6.2-liter V8 and the Max Trailering Package, owners will be able to pull 12,000 pounds, a hugely impressive figure.
We still aren't certain as to what sort of economy the new engine will get, but it'll probably be a bad bet for the fuel conscious. As for availability, expect to see the 6.2-liter trucks in showrooms later in the fall.

'Killing a Duramax' Gale Banks YouTube series methodically tunes a diesel to death

Learning or perfecting a skill by watching YouTube videos is known as attending YouTube University. GM Authority picked up on one of the video site's more fascinating courses, hosted by Gale Banks; in a fair world, he should be referred to as Professor Banks when it comes to diesel engines and truck tuning. A few months after GM introduced the updated L5P 6.6-liter Duramax diesel V8 in the 2020 Chevrolet Silverado HD and GMC Sierra HD that ships with 454 horsepower and 910 pound-feet of torque, Banks decided he wanted to methodically tune the engine to death. The purpose of the resulting series, called "Killing a Duramax," is to push more power out of the engine in order to discover which parts break and when — or, as Banks puts it, force-feed the Duramax "until the crank hits the street and the heads hit the hood." With that knowledge, Banks can figure out all the weak points on his way to building what he calls a "Superturbo," that being a supercharged, twin-turbo race engine with more than 1,000 hp. What makes the series fascinating is Banks' knowledge, paired with the company's comprehensive iDash engine monitoring system that keeps tabs on a glut of parameters every step of the way. So for instance, you get Banks explaining the differences between inches of mercury and barometric pressure, how those are different from the water content of the air measured in grains, then showing those readouts on the iDash, then explaining in detail how they affect the air density in the Duramax system. The stock Borg-Warner variable turbo gets a lot of airtime — Banks accuses it of being "out to lunch" because he feels it's the weakest link on the engine. That turns into a turbo teardown and a deep explanation of performance pitfalls, such as when air pressure on the turbine begins to diverge from the boost pressure coming from the compressor. Banks says he can keep close tabs on where power's coming from, because the iDash monitors the horsepower contribution provided by the ambient air, the turbo, and the intercooler separately. The major changes so far are a stouter Precision 7675 turbo and TurboSmart wastegate (episode 5), a twin intake (episode 6), a custom liquid-cooled intercooler from a marine engine, a new GM oil cooler and synthetic oil (episode 10), and new injectors (episode 11).