2011 Gmc 2500hd 4x4 Sle Extra Cab Duramax Diesel on 2040-cars

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2019 GMC Sierra Denali Drivers' Notes Review | Half measures

Associate Editor Reese Counts: This truck feels a full generation behind the competition. It's a half measure that feels more like a mid-cycle refresh than a whole new truck. There are a few high points: the 6.2-liter V8 is great (if thirsty) and the bed is wider than anything else in the class. The tailgate, too, is nifty, though some might write it off as a novelty. I also dig the tech, particularly the infotainment system and heads-up display. Ram might brag about its giant touchscreen, but I think I actually prefer the GMC's user interface. The rest can be summed up with a series of shoulder shrugs. The Sierra finally looks different than a Silverado, but I wouldn't call it handsome. The interior is spacious, but I'd knock the design and materials in a $45,000 truck, much less one approaching $70,000. It's not Toyota Tundra levels of terrible, it's just plain, cheap, and not nearly as space efficient as the Ram. It feels like GM's not even trying to move the needle with this truck. The more time I spend behind the wheel, the less I like it. Assistant Editor Zac Palmer: I got to spend a lot of seat time in this 2019 GMC Sierra Denali, and I came away generally unenthused by GM's most luxurious truck. We harp a lot about how expensive pickup trucks are these days, and this one's near $70,000 price tag is just the same. When you step inside a similarly-specced Ram, it feels like it's worth its price. When I step out of a Silverado and into a more expensive Sierra, I want to feel like it's money well spent. This Sierra Denali does not. Beyond the leather seats and a few small pieces of wood trim, it's hard, black plastic galore. What makes it all the more frustrating is that GM has most of the tech and features it needs (solid infotainment, 360-degree camera, wireless phone charging and the rear camera mirror is genuinely awesome). The presentation just comes off as dated from the start. It's a shame, because I have a strange affinity for how this truck looks from the curb. The sharp angles, brash styling and "tough truck" attitude is appealing to me. I like stomping on the gas and letting the 6.2-liter torque monster under the hood loose. But man do you pay the price for using that engine. Over a few hundred miles of driving I ended at a dismal 15 mpg reading on the trip computer — the saddest part of this was knowing these were mostly highway miles.

GM announces 3 new recalls affecting 1.7M vehicles in North America [w/video]

Still embroiled in the ongoing ignition switch recall, General Motors announced today three more discrete recalls, affecting a grand total of 1,546,900 vehicles in the US. The Detroit News reports that some 1.7 million vehicles are affected overall in North America. The first and largest of the trio of new recalls concerns some 1.18-million Buick Enclave and GMC Acadia crossovers from the 2008-2013 model years, Chevrolet Traverse from 2009-2013 (pictured above) and Saturn Outlook vehicles from 2008-2010. All of the crossover utilities may have an issue with the wiring harness for their seat-mounted side airbags. Apparently, the vehicles are equipped with a Service Air Bag warning light that, if ignored, "will eventually result in the non-deployment of the side impact restraints." Those restraints include the side airbags, a front-center airbag if the vehicle is so equipped and seatbelt pretensioners. Dealers of affected vehicles will be instructed to remove driver and passenger side airbag wiring harness connectors, and then "splice and solder the wires together." The second recall affects 303,000 Chevrolet Express (pictured right) and GMC Savana vans from model years 2009-2014, and with gross vehicle weights under 10,000 pounds. Said vehicles do not comply with a head impact requirement for unrestrained occupants, and will need a reworking of the instrument panel material to be sent back on the road. It doesn't sound as though there's a quick fix for this one, as the GM press release states: "Unsold vehicles have been placed on a stop delivery until development of the solution has been completed and parts are available." Finally, the third recall affects 63,900 Cadillac XTS luxury sedans from model years 2013 and 2014. A brake booster pump may be susceptible to corrosion by way of the relay, potentially causing and electrical short, overheating, melting of plastic components and even engine fires. GM says it is aware of two engine fires in unsold XTS models and two cases of melted parts. Repairs for the issues affecting the XTS have not not mentioned by GM in the release. The Detroit News is also reporting that along with news of the triple-recall, GM is taking a $300-million credit to help pay for the repair costs, and to deal with the ongoing costs associated with the ignition switch recall. In an attempt to explain just what GM has been doing in the face of these very serious issues, newly minted CEO Mary Barra has addressed the issues in a new video.

'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).