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NHTSA closes book on Ford, GM probes of 600,000 vehicles

US safety regulators have closed a pair of investigations into some 500,000 Ford Crown Victoria, Mercury Grand Marquis and Marauder sedans built between 2004 to 2007, and 100,000 Chevrolet Impala models from 2014. The Ford investigation focused on rusting heat shields, which may become dislodged and jam the steering, according to Reuters. The National Highway Traffic Safety Administration found that this happened very rarely. In fact, of the ten incidents filed with the government safety watchdog, six came from a single police department, which evidently had some sort of problem with its reporting. As for the Impala, the NHTSA investigators attributed two incidences of "unintended autonomous braking" to user error. In both cases, the vehicles were involved in rear-end collisions. According to GM investigators, it's believed that drivers accidentally activated the electric parking brake, causing the collisions. The vehicles in question were rental cars. Featured Gallery Ford Crown Victoria Related Gallery 2014 Chevrolet Impala View 10 Photos News Source: ReutersImage Credit: Ford, Chevrolet Government/Legal Chevrolet Ford Safety Sedan ford crown victoria mercury grand marquis

Chevy Colorado gets box delete option designed for upfitters

The Colorado, which marks the return of Chevrolet to the midsize truck segment, is receiving critical praise, and now it's time for the pickup to get to work. At the National Truck Equipment Association Work Truck Show in Indianapolis, IN, Chevy is unveiling a box delete option package for the model that allows businesses to custom tailor the Colorado to their needs. The choice to remove the bed is exclusively available on the Colorado Work Truck trim in the rear-wheel drive, extended cab model with a 305-horsepower, 3.6-liter V6 and six-speed automatic gearbox, and Chevy claims this is the only option of its type in the segment. Beyond the obvious loss of the rear, these trucks feature eight mounting points on the frame for upfitters to install any necessary modifications. They also get the Z82 trailering package and a locking differential. The versions with the box delete package carry a payload rating of 2,200 pounds an a gross vehicle weight rating of 6,001 pounds. "It's ideal for utility companies requiring service bodies, as well as landscapers and other businesses needing the utility of a flatbed," Ed Peper, US Vice President for General Motors Fleet and Commerical, said in the option's announcement. Further options with the package are limited to choosing a repositioned fuel filler for the upfitter to install and deleting the rear seat for extra interior capacity. The box delete becomes available in mid-April, and buyers get a $300 credit off the price of the Colorado when it's selected. Colorado 'Box Delete' Expands Options for Businesses Chevrolet package offers unique midsize pickup platform for alternative uses 2015-03-04 INDIANAPOLIS – With a box delete option, business owners and fleet managers can have it their way when it comes to customizing the back end of the 2015 Chevrolet Colorado. Chevrolet today announced availability of the package in mid-April. It is on display this week at the annual National Truck Equipment Association Work Truck Show in Indianapolis. It is the only such option offered in the midsize truck segment. "With the segment-leading efficiency and maneuverable size, the Colorado makes a great, flexible choice for urban businesses and fleets to make the most of a midsize truck," said Ed Peper, U.S. vice president, GM Fleet & Commercial.

'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).