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Why an independent rear suspension for GM's new, full-sized SUVs wasn't easy

A Motor Trend report last month laid out how Cadillac's 4.2-lier twin-turbo Blackwing V8 could be an orphan due to cost concerns in the GM empire. Last-minute chassis changes to Cadillac's new sedans and XT6 crossover led to engine bays that couldn't fit the Blackwing. On the SUV side, according to the report, the new independent rear suspension for big people haulers cost so much to implement that GM ruled out reworking the Escalade to accept the Blackwing. At least one commenter rightly asked how could a suspension swallow that much money. A new piece in Motor Trend has the answer. The excellent Alissa Priddle spoke to Tim Herrick, GM's executive chief engineer for full-size trucks, about why the clean-sheet IRS cost "multimillions of dollars."  First, GM would need to build a new body shop at the Arlington, Texas plant that assembles the automaker's big SUVs to stamp the numerous wholly new parts and panels accommodating an IRS. Then GM would need to design and pay for a new assembly process. On top of those up-front costs, there was the incremental cost of the four-link IRS components being more expensive than those in the trucks' former leaf-sprung solid axles. Herrick endured so many rejections for so long that he remembers the date and time when he got approval for the new unit. He said it came down to a meeting where he told a higher-up, "I'll make you a deal: If we get to the reveal, or if we launch this and you think this was a dumb idea, I'll hand you my badge and let you walk me out." Head to Motor Trend to read the full story. Based on Herrick being on stage to help present the new SUVs to the press, and on our First Ride in the new Chevrolet Tahoe and Suburban at GM's Milford Proving Grounds, it appears this will have a happy ending for all involved. Furthermore, since Herrick worked on the T1 platform that supports the big SUVs as well as the light- and heavy-duty pickups, he understood the demands on the commercial side, too. That could be why when Roadshow asked Tim Asoklis, chief engineer of the Tahoe and Suburban, if the new IRS could endure life in the Chevrolet Silverado and GMC Sierra, Asoklis answered, "Oh, absolutely." Related Video:    

Nissan Leaf ends 2013 with best sales month ever, but can't catch Chevy Volt

Nissan and Chevrolet both ended 2013 with solid sales figures for their plug-in vehicles, the first two that were released (all the way back at the end of 2010) from major automakers. As has been the story for most of 2013, December sales for the Nissan Leaf and the Chevy Volt were roughly the same. When we left the year-to-date running tally at the end of November, the Volt was at 20,702, while the Leaf was at 20,080. As you can tell from the image above (if you've been noticing the trend in these EV sales monthly flash-reports), the Leaf outsold the Volt, but was it enough to put the Nissan on top for the year? In 2013, Nissan sold 22,610 Leafs, more than twice as many as in 2012. Almost. The Leaf made a valiant attempt, and did have its best month ever with 2,529 units sold. That means that for 2013, Nissan moved a total of 22,610 Leafs, more than twice as many as in 2012 (that year, Nissan sold only 9,819 Leafs in the US) and actually more than 2012 and 2011 Leaf sales combined (which was 19,493). Nissan continues to see the effects of its price drop and expanded sales areas, with Georgia rapidly becoming a Leaf hotbed. Nissan's Paige Presley said that Atlanta was once again the Leaf's number one market and that, "sales are expanding deeper into Georgia markets such as Macon and Columbus." The Volt saw a boost upwards from a November slump and sold 2,392 units in December. That puts the plug-in hybrid's annual total at 23,094, just down from the 23,461 sold in 2012. For all of 2013, though, the Volt outsold the Leaf by 484 vehicles. In a competition like this, we'll count that as a win for both sides. We will our more detailed monthly green car sales report, which covers more of the fuel efficient vehicles on the market, up soon. News Source: GM, Nissan Green Chevrolet Nissan Electric Hybrid PHEV ev sales hybrid sales

2023 Chevy Equinox price goes up a few hundred bucks

Chevrolet and GMC have uploaded the configurators for sibling crossovers the 2023 Chevy Equinox and 2023 GMC Terrain. Both get a few changes to improve performance, and new paints. GM jettisoned the turbocharged 1.5-liter gas engine making 170 horsepower and 203 pound-feet of torque in both vehicles. Replacing it is a different turbocharged 1.5-liter gas engine making 175 hp and 203 lb-ft. The Equinox sends its power through a six-speed transmission, the Terrain fits a nine-speed transmission. On the Equinox, fuel economy in standard front-wheel drive trims holds steady, but the AWD trims lose one mile per gallon in their city and combined EPA ratings. On the Terrain, FWD trims lose one mile per gallon across the board, the AWD trims lose one mile per gallon in the city only. Both models also upgrade to an electro-hydraulic brake system, leaving vacuum-assisted braking behind. The Equinox color palette drops Cherry Red Tintcoat, Seaglass Blue Metallic and Silver Ice Metallic for replaces with Harvest Bronze Metallic, Radiant Red Tintcoat, and Sterling Gray Metallic. Buyers who want the razzle dazzle of the Equinox's optional Blackout and Redline Edition Packages are out of luck at the moment, both appearance flourishes unavailable to order. The Terrain's paint menu drops Cayenne Red Tintcoat, Hunter Metallic, and Quicksilver Metallic for Deep Bronze Metallic, Sterling Metallic, and Volcanic Red Tintcoat. All-wheel drive can be added to any Equinox and Terrain trim for $1,600, save for the Terrain AT4 and Denali that come standard with AWD. Prices for the 2023 Chevy Equinox after the $1,395 destination charge, and their differences from 2022, are: Equinox LS: $27,995 ($300) Equinox LT: $29,095 ($300) Equinox RS: $32,095 ($100) Equinox Premier: $33,195 ($300) New pricing for the 2023 GMC Terrain can only be seen when you visit the configurator's Summary page. The initial Build & Price page shows MSRP before the $1,500 premium on every trim to that pays for the mandatory OnStar with Connected Services plan. After the $1,395 destination charge, the new prices are: Terrain SLE: $31,295 Terrain SLT: $35,295 Terrain AT4: $37,395 Terrain Denali: $39,995