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The Car and Truck Fleet and Leasing Management Magazine

2015 Silverado Offers Trio of EcoTec3 Engines

November 17, 2014

2014 5.3L V-8 EcoTec3 AFM VVT DI (L83) for Chevrolet Silverado and GMC Sierra. (PHOTO: General Motors)
2014 5.3L V-8 EcoTec3 AFM VVT DI (L83) for Chevrolet Silverado and GMC Sierra. (PHOTO: General Motors)

The 2015 Chevrolet Silverado offers three EcoTec3 engines with advanced fuel-saving technologies that enable fleets to choose the performance and fuel efficiency that best meets their needs, according to General Motors, and are:

  • 4.3L V-6; 285 horsepower; 305 lb.-ft. of torque; up to 24 mpg EPA highway
  • 5.3L V-8; 355 horsepower; 383 lb.-ft. of torque; up to 23 mpg EPA highway
  • 6.2L V-8; 420 horsepower; 460 lb.-ft. of torque; up to 21 mpg EPA highway

Every EcoTec3 engine features advanced technologies such as direct fuel injection, continuously variable valve timing, and Active Fuel Management (cylinder deactivation) to provide power, torque, and efficiency across a broad range of operating conditions, according to the automaker.

“The latest Small Block engines are ideally suited to Silverado and to the tough jobs that pickup customers do every day,” said Jordan Lee, global chief engineer and program manager for Small Block engines at General Motors. “We give customers the power and torque of a full-size truck engine when they need it, then use Active Fuel Management and other advanced technologies to seamlessly shift to four-cylinder operation when the truck is under light loads, making the most of fuel efficiency.”

Silverado’s EcoTec3 engines are direct descendants of the original Small Block Chevy V-8, and benefit from more than 60 years – and more than 100 million engines’ worth – of continuous improvement.

The latest Gen 5 Small Block engine has endured tough testing, including a grueling performance durability procedure, where it was subjected to a high-speed/high-load torture session that simulated full-throttle blasts from the equivalent of 0 to 120 mph. With simulated transmission shift points inserted during the high-load test, the engine cycles non-stop between peak torque and peak horsepower for hundreds of hours – the equivalent of thousands of miles.

Testing on the Gen 5 Small Block engines include:

  • Severe thermal cycle testing, which quickly cycles the engine between extreme cold and hot coolant temperatures to validate the durability of engine components such as the head gaskets, exhaust manifolds and more.
  • The “hot scuff” test, in which a brand-new engine – or “green” engine to the engineers – is run at wide-open throttle with no break-in period, helping test critical engine parts such as bearings, piston ring sealing and bore scuffing.
  • Active Fuel Management (AFM) validation, which cycled the engine in and out of the cylinder-deactivating feature hundreds of thousands of times at a variety of engine speeds to ensure the performance and durability of its unique valve lifters.

Additionally, 2015 marks the 10th anniversary of AFM, the cylinder deactivation technology that improves fuel economy in trucks by seamlessly switching to four-cylinder mode to help save fuel during light-load driving. Introduced in 2005, it is currently available on the 2015 Chevrolet Silverado, Tahoe, Suburban, Camaro and Corvette.

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  1. 1. Blair [ November 18, 2014 @ 04:11PM ]

    Still debating wether to keep my 2014 chev Silverado. I bought on the assumption that a truck 21 years newer than my 93 Silverado would be a superior truck.. Wrong I was , put aside the bells and whistles on my 2014,my old 1993 with 870,000 kms is as good on fuel and actually much better on fuel in the winter. Of course my old unit is a mechanical diesel with only 220 ponies.A friend of mine just switched to a gas truck and he did warn me .How disappointing is 355hp gas. I travel to Arizona several times a year so my last trip in oct. was with the new truck. If all the shifting while in cruise control doesn,t bother you then use it and wear your transmission out quickly.When I buy a new chev I have high expectations as I did with my last chev. In 1993 I said I was going to drive it to 750,000 km they laughed but not any more. With not much more than regular maintenance and good habits it still exhibits incredible power and would easily still outperform the new model.I do know about gas chevs as I Still have a 1960 chev(38 yrs mine) and a 1969 chev (35 yrs mine). Just off topic a bit the dealership told me my 1993 chev did not qualify for the loyalty program offered,reeally I thought I would have been considered most loyal...Anyway to say the least I am disappointed so far and as I read more on afm I sink a little further.All that technology for 6% gain .Ultimately I know the tech stuff is to take take the tools out of my hands and make me pay the dealership for inferior work.
    I made my last chev go to the moon and back and then some, this new chev concerns me that I wont make it around the earth a few times.

  2. 2. j cat [ March 16, 2015 @ 10:33AM ]

    The GM AFM engines are problems with many , on engine failures prior to 100K miles. this begins with oil consumption that then rapidly spreads to lifter/cam failures. most avoid this AFM with AFM programing devices that remove this fuel saving , engine killing device. then they report no engine damage.
    good luck if you still have AFM turned ON>>>....

  3. 3. j cat [ March 16, 2015 @ 10:34AM ]

    The GM AFM engines are problems with many , on engine failures prior to 100K miles. this begins with oil consumption that then rapidly spreads to lifter/cam failures. most avoid this AFM with AFM programing devices that remove this fuel saving , engine killing device. then they report no engine damage.
    good luck if you still have AFM turned ON>>>....

  4. 4. j cat [ March 16, 2015 @ 10:34AM ]

    The GM AFM engines are problems with many , on engine failures prior to 100K miles. this begins with oil consumption that then rapidly spreads to lifter/cam failures. most avoid this AFM with AFM programing devices that remove this fuel saving , engine killing device. then they report no engine damage.
    good luck if you still have AFM turned ON>>>....

  5. 5. Ray [ September 27, 2015 @ 03:34AM ]

    My 2014 vibrates like hell in 4 cyl mode

  6. 6. Ramano [ May 02, 2016 @ 07:03PM ]

    The Ecotec3/Gen V engines seem to have eliminated the oil consumptiin issues. Not enough high mileage examples to know for sure if the AFM lifters are more reliable but so far it seems to be less frequent. I'm just glad GM hasn't gone the turbo V6 route. The Ecoboost F150s have been mess. Hopefully the next gen EB addresses the cam phaser/timing chain and spark plug issues.

 

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