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GM executive chief EV engineer says reducing cost of plug-in vehicles is 'huge priority'

As we know, another major automaker investing heavily in electrified vehicles is General Motors, and it's doing things much differently than rivals BMW, Ford or Nissan. The Chevrolet Volt extended-range EV is a modest seller at its $35,000 sticker price but a huge hit with owners. The Chevy Spark BEV, still in limited availability, puts smiley faces on its owners and drivers. The just-introduced Cadillac ELR, a sharp-looking, fun-driving $76,000 luxocoupe take on the Volt's EREV mechanicals, has admittedly low sales expectations. With this interesting trio in showrooms and much more in the works, the third vehicle electrification leader I collared for an interview at Detroit's North American International Auto Show (see #1 and #2) was Pam Fletcher, GM's executive chief engineer, Electrified Vehicles. ABG: Why do your EREVs need four-cylinder power to extend their range when BMW's i3 makes do with an optional 650 cc two-banger? "We designed [the Volt and the ELR] to go anywhere, any time" - Pam Fletcher PF: I get that question all the time: why not something smaller? You don't really need that much. You use the electric to its ability, then you just need to limp. But we designed those cars to go anywhere, any time, and we don't want their performance to be compromised. If you're driving through the mountains, we don't want you to be crawling up grades, or to be limited on any terrain. So it's optimized to be able to travel literally the biggest grades and mountain roads around the globe at posted speeds. Because what if you can't? Another good reason: when the engine is on, you have to run it wide open throttle, max speed, most of the time. And while we can do a lot with acoustics, and the ELR has active noise cancelation, a small-displacement, low cylinder-count engine at high speed, high load all the time isn't something you want to live with. That's how we came up with the balance we did among the key factors of performance, NVH [noise, vibration and harshness] and range. ABG: Where you go from here? Is the range-extender engine due for an update? PF: We know and love the current Volt, and there is still a lot of acclaim about it, so we think it's a good recipe. But we are heavily in the midst of engineering the next-generation car, which I think everyone will love and be excited about.

Cadillac CT6 loses the entry-level 2.0-liter turbo four-cylinder

General Motors continues its engine rationalization among product lines. A few days after Chevrolet dropped the old-generation LTG 2.0-liter turbocharged four-cylinder from the Traverse, Cadillac has jettisoned the new-gen LSY 2.0-liter turbo four from the CT6 range. Given a look at the dealer ordering system, Cadillac Society said the 2.0-liter option shows "built out" or "no longer available," and the online configurator at the Cadillac site confirms the omission. The retired engine can be had in the XT4 crossover, rated at the same 237 horsepower and 258 pound-feet of torque. This means a couple of things for the big sedan. The CT6 entry price was $50,495 before destination, but fitted with the now-base 3.6-liter six-cylinder, the entry price has gone up to $55,495. The other change is that rear-wheel drive is no longer available; the three remaining engine choices come with all-wheel drive. Those engines are the NA 3.6-liter V6 with 335 hp and 284 lb-ft of torque, a 3.0-liter twin-turbo V6 with 404 hp and 400 lb-ft, and coming in a few months, the detuned 4.2-liter Blackwing twin-turbo V8 with 500 hp and 574 lb-ft, down from 550 hp and 627 lb-ft. Cadillac Society thinks one of the possibilities for making the move could be that GM is having a hard time meeting demand for the 2.0-liter. That might be, but we think no matter the reason, the result puts more logical pricing between the midsize CTS/CT5 and the full-size luxury flagship. We don't know how Cadillac will price the coming CT5, but there's now an $8,005 difference between the CTS and the CT6, instead of the $4,000 gap when the 2.0-liter was a CT6 option. Mercedes-Benz, for instance, puts a $12,000 gap between the C-Class and the E-Class, a $38,000 gulf between the E-Class and the S-Class. There's a $19,000 difference between an Audi A4 and A6, a $25,000 difference between an A6 and an A8. It isn't clear if this will affect every other market where the CT6 is sold. The Canadian, Mexican, and French Cadillac site configurators don't list the 2.0-liter turbo, but the Chinese Cadillac site does.

Cadillac Super Cruise, a hands-off review

Cadillac Super Cruise won't let you eat breakfast behind the wheel, climb in the back seat or any of the other stupid human tricks displayed on YouTube by Tesla owners. It even won't allow the car to change lanes on its own, like Tesla Autopilot. But it's a big step on the road to full autonomy, a huge convenience on long-distance road trips and a substantial technological triumph for Cadillac. In the simplest terms, Super Cruise is a lane-centering enhancement to adaptive cruise control (ACC). But Super Cruise is anything but simple. Its technical complexity — hence its long delay after first being unveiled five years ago — belies its straightforward operation and intuitive user interface, which I discovered on an almost 750-mile, 11-hour drive in a 2018 Cadillac CT6 between Dallas and Santa Fe to test the system. LOADS OF LIMITATIONS First, let's dispense with the details and disclaimers. Super Cruise is standard on the 2018 CT6 Platinum and a $5,000 option on other trim levels. Because Super Cruise is supported by OnStar — an OnStar operator will call to find out if first responders need to be sent in a worst-case scenario — a three-year OnStar Super Cruise Package is included with the system. Super Cruise has loads of limitations that are probably more concerning to GM's legal counsel than they were to me during my long drive. Some are no-brainers, such as not for use in construction zones or for driving on the shoulder. But the system can also be stymied by adverse weather, poor visibility and faded lane markings. Super Cruise only works on freeways with on and off ramps and a center divider. ACC and forward collision warning also need to be engaged, and the system's cameras and radar sensors can't be obstructed. To keep drivers from looking away from the road for too long — and to keep the system active — an infrared camera on top of the steering column keeps an electronic eye on the driver's seat. GM has over 100 patents alone on this Driver Attention System, including an algorithm that triangulates the nose, eyes and ears in case the camera can't see through sunglasses to make sure you're not nodding off. In addition to the car's visible sensors, another major component of the system is something you don't see: mapping software. But not the kludgy kind that powers in-dash navigation systems.