Cadillac Sts V High Perforance Single Owner Car Now Available on 2040-cars

Auto blog

GM recalling 2013 Buick LaCrosse, Cadillac SRX over transmission software

The National Highway Traffic Safety Administration has issued recalls for the 2013 Buick LaCrosse and 2013 Cadillac SRX due to a problem with the software for the transmission controller. On about 27,000 SRX and LaCrosse models, the transmission could accidentally be shifted to Sport mode, which would reduce the amount of engine braking drivers experience.
NHTSA says this could increase the risk of a crash, but, fortunately, the required fix is simply an update to the software.
While we're on the subject of General Motors vehicle recalls, a small number (48) of compressed natural gas versions of the 2011 Chevrolet Express are also being recalled for a potential risk of fire or explosion. Yikes. Both official recall notices are posted below.

GM patent reveals new two-stage turbocharger

Modern turbochargers may be some of the best ever made, but performance is something that engineers are always trying to improve. According to GM Inside News, General Motors (GM) is hoping to alleviate some of the negative aspects of a two-stage turbocharger setup with a newly-patented design. The patent, that was filed on May 19, 2016, reveals a clever bypass system that allows the engine, a four-cylinder unit, to optimize both the low-pressure and high-pressure inlets for its respective functions. According to the filing, a conventional two-stage turbocharger setup is engineered to allow both turbines to operate simultaneously at low and mid engine speeds. At high engine speeds, only the low-pressure turbine works. The setup can't isolate either the low or high pressure side, which can impair low-end performance. GM's new two-stage turbocharger setup looks to eliminate this by linking the high-pressure turbo to the exhaust manifold through the high-pressure inlet duct. The low-pressure turbo is attached to the high-pressure turbo by a low-pressure inlet duct, which is linked to a connecting channel. A single actuator that is housed in the exhaust manifold creates a bypass that can opens the high-pressure inlet or close the connecting channel. Depending on what the engine load and speed is, the ECU guides the actuator—a single rotating spindle with discs corresponding to flanges on the high and low pressure sides—to isolate one of the two turbos. Isolating the turbos allow the respective inlets to be engineered for the best possible fluid dynamic performance. The setup should increase performance and decrease lag. There's no word on what car this setup will make an appearance on, but it will most likely be used in premium vehicles before trickling down to the rest of GM's vehicles. Related Video: News Source: GM Inside News, AutoGuide via GM Authority Cadillac Chevrolet GM Technology Sedan turbo patent engine turbocharging

Mystery Cadillac Escalade prototype spied testing on public roads

This mystery Cadillac Escalade prototype could be a rumored V model featuring a supercharged LT4 V8. This prototype, sporting a fancy exhaust and other unique elements under fairly elaborate camouflage, was spied testing on public roads in Michigan.  Since it's still quite comprehensively disguised, we can't say much for certain about what this prototype has going on underneath. We can see a new set of wheels, a quad-tip exhaust and what appears to be a redesigned lower front bumper, but our spies didn't indicate anything else definitive — not even the telltale whine of a supercharger. That seems a glaring omission, given that a V model would almost certainly be powered by the same supercharged V8 found in the CT5-V Blackwing, where it is expected to develop well north of 650 horsepower.  Cadillac chief engineer Tony Roma has previously suggested that more V-badged cars are in the pipeline without confirming which ones or when to expect them. An unverified report published in February 2021 claims the Escalade's 6.2-liter V8 will soon receive a 200-horsepower bump thanks to a factory-backed, dealer-installed supercharger; a full-fledged V model would take that formula a step further. If you're not familiar with Cadillac's latest performance offerings, "V" models are now the mid-range performance variants, similar to Audi's "S" cars in that they offer a bump in power and handling but stop short of being full-blown track monsters. That treatment is reserved for the new "Blackwing" nameplate, which was derived from the twin-turbocharged V8 of that same name that was originally slated to power those range-topping models.  Related video: