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GM Ultium tech can scavenge heat from everywhere, even you

GM likes to give us tidbits about its Ultium platform from time to time, and today it’s telling us about the platformÂ’s ability to capture waste heat from the propulsion system. In addition to capturing from the propulsion system, it can also capture humidity from both inside and outside the vehicle and even from passengersÂ’ body heat. Yes, you, your family and/or your friends are a usable heat source as far as GM EVs are concerned. It then deploys the heat in an advantageous way. If at this point, youÂ’re screaming, "Heat pump!" youÂ’d be right. WeÂ’re talking about an elaborate heat pump system that GM is using for its Ultium-based vehicles. Every Ultium-based GM vehicle gets this system that is covered by 11 patents and four publications. The waste heat it collects is used in a number of ways, but its primary use is to heat the cabin quickly and efficiently. GM claims it can heat the cabin of its Ultium-based vehicles quicker than vehicles with traditional internal combustion engines. Plus, when put to use, GM claims that using the heat pump provides its EVs with up to 10% more range than theyÂ’d have without. Beyond heating the cabin, the heat pump is capable of putting waste heat to use by preheating the battery prior to charging so that you can charge quicker. The system can even cool the propulsion system in preparation for Watts to Freedom (WTF) launch control starts. GM says this was vital in helping the Hummer EV achieve its bonkers 0-60 mph time of about 3 seconds. “Having a ground-up EV architecture gives us the freedom to build in standard features like UltiumÂ’s energy recovery capabilities,” said Doug Parks, GM executive VP of global product development, purchasing and supply chain. “This helps us squeeze more efficiency, performance and overall customer benefit out of our EVs.” GM says itÂ’s been developing heat pump technology since the EV1 and its heat pump. This is the modern evolution of that technology, and GM says itÂ’s going to be implemented in every Ultium-based vehicle as a standard feature. Related video: Green Cadillac Chevrolet GM GMC Technology Electric Future Vehicles

Fullsize GM SUVs have a problem that's making owners sick

Some fullsize SUV owners are getting sick, thanks to a buffeting and vibration problem in 2015 model year examples of the Chevy Tahoe and Suburban, Cadillac Escalade, and GMC Yukon. According to owners' complaints to the National Highway Traffic Safety Administration, the issue can vary from an annoying vibration inside the cabin to an experience so severe that it leads to dizziness and headaches. General Motors is aware of the complaints, but the fix isn't so simple. According to spokesperson Tom Wilkinson to Autoblog, the company "has been tracking this issue for a while." The problem has a fairly low incidence rate, but when it does occur the issue can be "uncomfortable and annoying for owners." There's no precise cause for the issue, Wilkinson claims, and in some cases, simply balancing the tires or changing the door seals can make it go away. However, not all of the fixes are so simple. AutoGuide dug deep into the problem and discovered a GM preliminary information bulletin that advised dealers to remove the headliner and to check the roof's bonds to the bows that go across the vehicle. However, that document included a note that the solution might not entirely eliminate things. According to AutoGuide, adding Dynamat insulation to the roof sometimes helped the problem. A GM spokesperson also told AutoGuide the company fixed the problem at the end of the 2015 model year, and didn't go into any more detail. This roof issue seems linked to some of the worst droning in these SUVs. According to one complaint from a 2015 Suburban owner to NHTSA: "Roof will not remain attached to the roof bows. This causes the buffeting similar to a window being down when all are up. The results span from annoying to painful." A 2015 Yukon owner claims to have another alleged cause for the problem in a NHTSA complaint from February 2015. This person brought their SUV to the dealer seven times over the course of four weeks for vibrations. The dealer replaced the driveshaft, suspension components, and more, but nothing worked. According to an engineer to the service adviser: "In an effort to prevent roll overs, they designed the frame and body mounts too stiff. There are 40 engineers working on issues, they have no solutions that work across the board." Wilkinson told Autoblog that GM is working with customers on an individual basis to rectify things. Since these are newer vehicles, dealers should also fix the problem under warranty.

2021 Cadillac Escalade vs. 2020 Lincoln Navigator | How they compare on paper

The 2021 Cadillac Escalade arrived late last night, and we all know what that means: It’s comparison time. Specifically, weÂ’re pitting the new Escalade versus the 2020 Lincoln Navigator. The sales gap between the long-time competitors has grown dangerously close for Cadillac ever since the revolutionary new Navigator came out for the 2018 model year. In 2019, the Navigator was only about 4,000 units down from the Escalade. Cadillac intends to widen that gap back up with a new truck, and now itÂ’s time to see if itÂ’s brought the right goods to the party. With the redesigned model that now features an independent rear suspension, these two are more alike than theyÂ’ve been in a long time. The Escalade was stuck with the less space-efficient solid rear end up until now, as GM hadnÂ’t yet made the switch to IRS that Ford long-ago did. Now that it has, these two are super similar from a dimensions perspective. Cadillac was playing catch-up in this fight, so it knew exactly where it needed to aim to come out victorious in a specs battle such as this one. A quick note on the chart below. Both of these models have a “regular” and “long” version. The EscaladeÂ’s long variant is still named ESV, and the NavigatorÂ’s long version is simply named L. In the dimensions section, we distinguish between the two with a “/” — the “regular” length version is on the left, and the “long” version is on the right side of the slash. The numbers are below: Powertrain The Lincoln Navigator still reigns supreme when it comes to power, as the 3.5-liter twin-turbo V6 is high on both horsepower and torque. GMÂ’s small-block V8 comes close, but ultimately falls short by 30 horsepower and 50 pound-feet of torque to the twin-turbo V6. Cadillac does have an ace up its sleeve, though. It comes in the form of the 3.0-liter turbo-diesel inline-six engine. Lincoln hasnÂ’t dropped the PowerStroke diesel into the Navigator (and we'd be shocked if it does), so Cadillac has a unique offering in this segment now. The diesel will be optional on the Escalade, but it has less horsepower and the same amount of torque as the V8. We expect the big advantage for the diesel will come in fuel economy, an area where the Silverado Duramax diesel currently outpaces the full-size truck competition. Both of these big SUVs come standard with 10-speed automatic transmissions. Intriguingly, itÂ’s the 10-speed automatic that was co-developed between Ford and GM.