2004 Chevrolet Tahoe Z71 Sport Utility 4-door 5.3l on 2040-cars

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2016 Chevrolet Colorado Diesel First Drive [w/video]

The first thing you notice inside the diesel Chevy Colorado is that it's quiet. Almost too quiet. A lot has been done to quell noise and vibration with this new powertrain, and it shows – or rather, doesn't. There's some characteristic diesel clatter at idle, but even then it's distant and practically disappears as you start moving down the road. At full throttle, when the engine is at its noisiest, the sound isn't particularly diesel-like, just a pleasant intake breath. The accompanying smoothness is almost eerie. When we ask where all the noise went, Chevy's engineers, marketing guys, and PR reps all explain that this refinement is what Americans want. We're still not sure. This is a truck, after all, and the diesel pickup customer is different from the guy buying a diesel Cruze for his highway commute. Chevy contends that they're also not the same as the buyer of a Silverado HD. Although this 2.8-liter Duramax four-cylinder has been in service elsewhere around the globe, its first US application is in the Colorado and its GMC Canyon twin. The engine puts out 181 horsepower and 369 pound-feet of torque, and it does so unobtrusively as a result of a lot of modifications for our market. To keep normal diesel sensations out of the cabin, the intake and oil pan both get acoustic treatments. A new, thicker material is used for firewall sound deadening. Redesigned balance shafts have tighter tolerances to increase smoothness. The diesel powertrain is smoother than the Colorado's gasoline V6. One of the more interesting and certainly unexpected vibration-reduction changes is a special torque converter from German supplier LuK equipped with a centrifugal pendulum absorber. This pendulum spreads from the center of the torque converter as engine speed increases and is tuned to absorb the four-cylinder's second-order vibrations, not just those in a narrow frequency band. It does an admirable job, especially considering the engine's biggish, 0.7-liter cylinders, which lead to bigger vibrations. The result is a powertrain that's smoother than GM's (not particularly smooth) corporate V6, which is available in the standard Colorado. It's quieter than a Cruze diesel and even out-softens some gas direct-injection engines on the market. Paradoxically, it may be the most refined of all of the Colorados. No vibration comes through the steering wheel, pedals, floorboards, or even the rearview mirror. But you can tell it's a diesel when you hit the throttle.

AWD turbodiesel Equinox, Terrain dropped for 2020

Citing low demand, General Motors is dropping the AWD diesel options off the Chevrolet Equinox and GMC Terrain roster. Chevrolet spokesman Kevin Kelly confirmed to CarsDirect that for 2020, the diesel versions of these SUVs will only be offered with front-wheel-drive. CarsDirect notes that with the AWD diesel Equinox and Terrain gone, the only AWD diesel option in this class is the Mazda CX-5 Skyactiv diesel, which is significantly more expensive: As the AWD diesel CX-5 is only available in a fully loaded Signature specification, the $42,045 price tag is almost $10k heftier than the cheapest comparable Equinox, the AWD 1.6-liter diesel LT which starts from $32,495. The 2019 GMC Terrain AWD SLE costs $34,795 in comparison, which works out to being around $7,200 cheaper than the Mazda. The higher trim levels for the Equinox and Terrain are Premier and SLT, respectively. Some reasoning behind the AWD diesel GM SUV's low uptake is their own price difference to base FWD gasoline models: you can get a 1.5-liter Equinox for less than §25,000 listed. While the 2.2-liter Mazda has plenty more power at 168 hp and 290 lb-ft, compared to 137hp and 240 lb-ft in the 1.6-liter GM SUVs, the Equinox and Terrain are notably more frugal – they are rated 32mpg combined, while the Mazda can manage 28 mpg. With better fuel economy and a significantly lower list price, the General Motors twins are at least more wallet-friendly when it comes to numbers, and as the vehicles will cease to be built in that configuration there's likely to be some cash on the hood on ones in stock. News Source: CarsDirectImage Credit: Chevrolet Chevrolet GM GMC confirmed gmc terrain chevrolet equinox

IIHS: High numbers of drivers treat partially automated cars as fully self-driving

WASHINGTON — Drivers using advanced driver assistance systems like Tesla Autopilot or General Motors Super Cruise often treat their vehicles as fully self-driving despite warnings, a new study has found. The Insurance Institute for Highway Safety (IIHS), an industry funded group that prods automakers to make safer vehicles, said on Tuesday a survey found regular users of Super Cruise, Nissan/Infiniti ProPILOT Assist and Tesla Autopilot "said they were more likely to perform non-driving-related activities like eating or texting while using their partial automation systems than while driving unassisted." The IIHS study of 600 active users found 53% of Super Cruise, 42% of Autopilot and 12% of ProPILOT Assist owners "said that they were comfortable treating their vehicles as fully self-driving." About 40% of users of Autopilot and Super Cruise — two systems with lockout features for failing to pay attention — reported systems had at some point switched off while they were driving and would not reactivate. "The big-picture message here is that the early adopters of these systems still have a poor understanding of the technologyÂ’s limits," said IIHS President David Harkey. The study comes as the National Highway Traffic Safety Administration (NHTSA) is scrutinizing Autopilot crashes. Since 2016, the NHTSA has opened 37 special investigations involving 18 deaths in crashes involving Tesla vehicles and where systems like Autopilot were suspected of use. Tesla did not respond to requests for comment. Tesla says Autopilot does not make vehicles autonomous and is intended for use with a fully attentive driver who is prepared to take over. GM, which in August said owners could use Super Cruise on 400,000 miles (643,740 km) of North American roads and plans to offer Super Cruise on 22 models by the end of 2023, did not immediately comment. IIHS said advertisements for Super Cruise focus on hands-free capabilities while Autopilot evokes the name used in passenger airplanes and "implies TeslaÂ’s system is more capable than it really is." IIHS in contrast noted ProPILOT Assist "suggests that itÂ’s an assistance feature, rather than a replacement for the driver." NHTSA and automakers say none of the systems make vehicles autonomous. Nissan said its name "is clearly communicating ProPILOT Assist as a system to aid the driver, and it requires hands-on operation.