1968 Cadillac Coupe Deville Convertible 472 Big Block Automatic Garaged Kept on 2040-cars

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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.

Junkyard Gem: 1997 Cadillac Catera

GM's Cadillac Division was having a tough time in the early 1990s, with an onslaught of Lexuses and Infinitis pouring across the Pacific to steal their younger customers while high-end German manufacturers picked off their older customers. Flying an S-Class-priced model between assembly lines in Turin and Hamtramck hadn't worked out, so why not look to the European outposts of the far-flung GM Empire for the next Cadillac? That's how the Catera was born, and I have found a rare first-year example in a North Carolina car graveyard. Across the Atlantic, GM's Opel and Vauxhall were doing good business with prosperous European car buyers by selling them the sleek rear-wheel-drive Omega B (whose platform also lived beneath the Holden VT Commodore in Australia). Here was a genuine German design that competed with success against BMW and Audi on their home turf! So, the Omega B was Americanized and renamed the Catera. Opel wasn't a completely unknown brand to Americans at the time, since its cars were sold here with their own badging through Buick dealerships from the middle 1950s through the late 1970s (for a much shorter period, American Pontiac dealers attempted to sell Vauxhalls). Even after that, plenty of Opel DNA showed up in the products of U.S.-market GM divisions. The Catera was by far the most affordable Cadillac for 1997, with an MSRP starting at $29,995 (about $59,113 in 2024 dollars). Being a genuine German car, it looked much more convincingly European than the DeVille ($36,995), Eldorado ($37,995) and Seville ($39,995). Inspired by the ducks on the Cadillac emblem (they were really supposed to be martlets, mythical birds with no feet and occasionally lacking beaks), Cadillac's marketers went after youthful car shoppers with a whimsical animated duck named Ziggy. For the 21st century, the birds were removed from the Cadillac emblem in order to attract California buyers under 45 years of age. As we all know, the Catera flopped hard in the marketplace. What sold well in Europe turned out not to translate so well in in North America, especially when bearing the badges of such a historically prestigious brand. The Catera's engine was a 54-degree 3.0-liter V6 rated at 200 horsepower and 192 pound-feet. Just as had been the case with its predecessor, the Allante, no manual transmission was available.

Fullsize GM SUVs have a problem that's making owners sick

Some fullsize SUV owners are getting sick, thanks to a buffeting and vibration problem in 2015 model year examples of the Chevy Tahoe and Suburban, Cadillac Escalade, and GMC Yukon. According to owners' complaints to the National Highway Traffic Safety Administration, the issue can vary from an annoying vibration inside the cabin to an experience so severe that it leads to dizziness and headaches. General Motors is aware of the complaints, but the fix isn't so simple. According to spokesperson Tom Wilkinson to Autoblog, the company "has been tracking this issue for a while." The problem has a fairly low incidence rate, but when it does occur the issue can be "uncomfortable and annoying for owners." There's no precise cause for the issue, Wilkinson claims, and in some cases, simply balancing the tires or changing the door seals can make it go away. However, not all of the fixes are so simple. AutoGuide dug deep into the problem and discovered a GM preliminary information bulletin that advised dealers to remove the headliner and to check the roof's bonds to the bows that go across the vehicle. However, that document included a note that the solution might not entirely eliminate things. According to AutoGuide, adding Dynamat insulation to the roof sometimes helped the problem. A GM spokesperson also told AutoGuide the company fixed the problem at the end of the 2015 model year, and didn't go into any more detail. This roof issue seems linked to some of the worst droning in these SUVs. According to one complaint from a 2015 Suburban owner to NHTSA: "Roof will not remain attached to the roof bows. This causes the buffeting similar to a window being down when all are up. The results span from annoying to painful." A 2015 Yukon owner claims to have another alleged cause for the problem in a NHTSA complaint from February 2015. This person brought their SUV to the dealer seven times over the course of four weeks for vibrations. The dealer replaced the driveshaft, suspension components, and more, but nothing worked. According to an engineer to the service adviser: "In an effort to prevent roll overs, they designed the frame and body mounts too stiff. There are 40 engineers working on issues, they have no solutions that work across the board." Wilkinson told Autoblog that GM is working with customers on an individual basis to rectify things. Since these are newer vehicles, dealers should also fix the problem under warranty.