2010 Gmc Yukon Denali Black-black Awd Auto Nav Sunroof Rear-cam Rear-ent 3rd Row on 2040-cars

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GM 6.2L EcoTec V8 rated at 21 mpg by the EPA

General Motors is already laying claim to best-in-class power for its new 6.2-liter V8 that will be offered in the 2014 Chevy Silverado and GMC Sierra this fall, and now it has released fuel economy numbers for the big engine. Available as an option on the Silverado LTZ and High Country (shown above) models as well as the the Sierra SLT and Denali trims, the 6.2L EcoTec3 V8 will return 15 miles per gallon in the city and 21 mpg on the highway on rear-wheel-drive trucks; these numbers drop by one mpg each on four-wheel-drive models.
These estimates are in addition to the engine's 420 horsepower, 460 pound-feet of torque and max trailering capacity of 12,000 pounds, and considering all that power it's not terribly far away from the fuel economy of GM's equally new 4.3-liter V6 and its rating of 18 mpg city and 24 mpg highway. This announcement comes just days after a report indicated that GM is unable to keep up with the demand of the 5.3-liter V8 in the fullsize Chevy and GMC trucks due to supplier issues. GM's official press release for the 6.2-liter V8's fuel economy is posted below.

Junkyard Gem: 1990 GMC S-15 Jimmy 4x4

The General sold the GMC-badged version of the first-generation Chevy S-10 Blazer, known as the S-15 Jimmy or just the Jimmy, from the 1982 through 1994 model years. These trucks were based on the small S-10 pickup and sold well (until small trucks were forced to get bigger and less truck-like after the dawn of the Ford Explorer-inspired commuter-truck era), but they have become difficult to find in vehicle graveyards in our current century. Here's a '90 Jimmy 4x4 with red-primer paint job, found in a self-service yard on California's Central Coast last month. GMC shoppers could get the 1990 Jimmy as a rear-wheel-drive truck, but this one has the four-wheel-drive option that allowed Tahoe-bound skiers to skip the chain monkeys on the way to the slopes (the CHP, understanding that California drivers have a 95% mortality rate on snow or ice, requires chains or four-wheel-drive to get over Donner Pass when there's a hint of snow forecast). GM sold so many millions of small-block Chevrolet V8s that it made economic sense to use the same tooling to produce a V6 version. The result was this truck's 4.3-liter V6 that was three-quarters of the good old Chevy 350 (5.7-liter) V8 that powered so many Camaros, Chevelles and Impalas. The 4.3 didn't make smooth power, but it got the job done and held together quite well. This one was rated at 160 horsepower, good enough for the Jimmy 4x4's 3,512-pound curb weight. These days, though, used-truck shoppers insist on at least two tons of heft plus four doors. Some discount lot in Monterey or Salinas couldn't even get $999 for this truck, and so it ended up in the final stop before the cold steel jaws of the crusher. 1990 was the last model year for the two-door-only Jimmy; for 1991, the Jimmy came with a choice of two doors (for devil-may-care types) or four doors (for drop-the-kids-at-school types). I've always liked the look of the instrument panels on the early S-10s and its siblings; even though the designers had to work within strict budgetary limitations, they made the panels look interesting. This truck nearly made it to 170,000 miles before the end. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. So powerful with the 4.3 (the regular S-15 pickup still came with a 2.8-liter V6 as base equipment) that it could destroy a TV camera.

GM able to add diesel to half-ton pickups if market demands it

A few years ago, the trend in half-ton pickup trucks was ultra-luxurious trims, often with the words "limited" or "platinum" tacked on after the model name. That was well and good, but we like this latest fad a lot more - diesel engines. First, Ram came to bat with a 3.0-liter, V6 turbodiesel for the 1500, then Nissan announced that the next-generation Titan would be getting an eight-cylinder Cummins diesel.
Now, word is coming in from AutoGuide that General Motors can, if it so chooses, drop a diesel engine into its light-duty trucks. The plot thickens, though, as it turns out that said diesel would be the same one Ram is using for its truck. According to AG, that engine comes from VM Motori, which GM owns a sizable chunk of. Therefore, GM can snag the 3.0-liter, V6 diesel for its trucks just as easily, if not more easily, than Ram.
If it's so easy for the Detroit-based manufacturer to access the engines, why not offer the a diesel-powered Sierra and Silverado from the start, then? According to GM spokesman Tom Wilkinson, The General doesn't seem so confident in a diesel pickup outside of its HD offerings. According to Wilkinson, the cost-benefit ratio doesn't line up for customers, thanks to both the impact on the truck's sticker price and the higher price of diesel, in general (the national average for a gallon of diesel is 43 cents more than a gallon of 87-octane unleaded).