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GM considering new powertrain options for large SUVs

Aside from the new General Motors offerings, there's not a whole lot of action going on in the fullsize SUV segment. That doesn't seem to be stopping GM from pushing the envelope in the market as Automotive News is reporting that the automaker is looking to introduce some new powertrain options into the Chevy Tahoe (and Suburban), GMC Yukon (and Yukon XL) and the Cadillac Escalade - all have been redesigned for the 2015 model year.
Now, we already know that GM and Ford are collaborating on nine- and ten-speed transmissions for a broad range of applications (including the big SUVs), but this new report says that GM is also considering other options as a way to one-up the competition and, of course, to optimize fuel economy. AN quotes Jeff Luke, executive chief engineer for GM trucks, as saying that "interesting powertrain technologies" are coming including a return of a hybrid SUV and possibly even a diesel engine. Although it sounds like the latter could come down to how customers respond to the 2014 Jeep Grand Cherokee EcoDiesel.

GM will recall 3.5 million pickups and SUVs to fix brake issue

WASHINGTON — General Motors Co is recalling 3.46 million U.S. pickup trucks and SUVs to address a vacuum pump issue that could make braking more difficult and increase the risk of a crash. The recall, which covers 2014-2018 model year vehicles, including some Cadillac Escalade, Chevrolet Silverado, Chevrolet Tahoe, GMC Sierra, Chevrolet Suburban and GMC Yukon vehicles, was triggered because the amount of vacuum created by the vacuum pump may decrease over time, GM told the National Highway Traffic Safety Administration (NHTSA) in documents posted Wednesday. NHTSA opened a preliminary investigation into the issue in November 2018, and said it had reports of 9 crashes and two injuries related to the issue. It provided GM in July with additional field reports that prompted the automaker to open an investigation. The company did not immediately say on Wednesday how many injuries or crashes are linked to the issue but said it could impact braking in "rare circumstances." GM said dealers will reprogram the Electronic Brake Control Module with a new calibration that will improve how the system utilizes the hydraulic brake boost assist function when vacuum assist is depleted. GM said the vacuum assist pump, which is lubricated with engine oil that flows into the pump through a filter screen, can in some cases lose effectiveness over time, as debris such as oil sludge can accumulate on the filter screen. GM told NHTSA that prior model years used a different brake assist system design, and vehicles manufactured after 2018 were not equipped with the affected pump design. Recalls Chevrolet GM GMC

Recon Power Bikes partners with GMC on AWD Hummer eBike

Want the ultimate two-wheeled companion to your new GMC Hummer EV, or maybe you just want something electric and all-wheel drive without the Hummer's price tag? Recon Power Bikes has you covered with its new Hummer EV e-bike. Not convinced? Well, hear the specs before you bail. You might be surprised.  Recon's new offering is marketed as "all-wheel drive," which our resident two-wheeled expert and consumer guru Jeremy Korzeniewski tells us is quickly becoming conventional nomenclature for dual-motor electric bicycles. Hey, if you've got two wheels and both have motors, it's technically correct, even if it sounds a bit silly to those of us who prefer the comforts of a cage and four wheels on pavement.  Each of the two motors produces 750 watts, which combines for just a little over 2 (two!) horsepower, but remember, this is a bicycle, not a sport bike. And flipping the coin, that lone pony is accompanied by more than 118 pound-feet (or roughly a 1.8-liter Miata's worth) of torque. Recon says its top speed is north of 28 mph, which is plenty quick for something that you might see strapped to the same hitching post as a 30-year-old Huffy. The base battery offers 17.5 aH of capacity; an upgrade bumps that to 21. Recon says the total range should fall between 40 and 50 miles. The package is rounded out by an adjustable front suspension, four-piston hydraulic brakes, puncture-resistant 4-inch all-terrain tires with molded-in liners and Shimano gearing.  Recon says the Hummer e-bike offers "on-demand" AWD (rear by default; both when called upon) and even offers three fixed drive modes — "Cruise" (rear wheel drive, for maximum range and efficiency), "Traction" (front wheel drive, for navigating with low grip) and "Adrenaline" (for "off road all wheel drive dominance of the toughest, steepest terrain"). "Adrenaline" mode even offers real-time torque vectoring, just like a real Hummer EV. The two vehicles are basically the same, only the bike weighs just 96 pounds, not more than 9,000.  Look for the Recon Power Bikes GMC Hummer e-bike to hit the market in early December with a starting price of $3,999. That may sound steep, but keep in mind that QuietKat's Jeep eBike costs nearly double that.  Related video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. Featured Gallery Recon Power Bikes GMC Hummer eBike Green GMC Green Culture Bikes Electric