General Motors has released more information on the 4.3-liter V6 available in the 2014 GMC Sierra. The engine will serve up 285 horsepower and 305 pound-feet of torque, with a six-speed automatic transmission, and giving the V6 Sierra a maximum tow rating of 7,200 pounds in regular cab, short bed four-wheel drive configuration. GM claims that figure is 500 pounds more than the equivalent Ford F-150 equipped with a 3.7-liter V6, and 700 pounds more than the Ram 1500 with its 3.6-liter V6. Buyers can expect to see the 2014 GMC Sierra with the 4.3-liter engine start at $25,085 including destination.

While the engine does deliver more torque than either of its main competitors, it falls short on the horsepower front. The 3.7-liter V6 in the F-150 develops 302 hp while the 3.6-liter V6 in the Ram 1500 yields 305 hp. GM says fuel economy estimates for its newest entry will land later this year. Check out the full press release below for more information.
Show full PR text
2014 Sierra's New 4.3L Tops in Standard V-6 Pickup Torque

New EcoTec3 engine continues rich GMC V-6 heritage

DETROIT – When the all-new 2014 GMC Sierra full-size pickup arrives this summer, its standard 4.3L EcoTec V-6 it will offer the most torque of any standard V-6 in the segment – 305 lb-ft (413 Nm).

Buyers will choose from three new, advanced EcoTec3 engines – a 5.3L available at launch, followed by the 4.3L and 6.2L versions available later this year. All are designed specifically for the high trailering and hauling demands unique to truck buyers.

Torque is the turning force that generates off-the-line acceleration and confident trailering performance. Sierras equipped with the 4.3L EcoTec3 V-6 will have trailering ratings up to 7,200 pounds (3,266 kg) for a regular cab, short bed, four-wheel-drive model – 500 pounds more than the most capable Ford F-150 3.7L and 700 pounds more than a Ram 1500 3.6L. Sierra's standard V-6 produces an SAE-certified 285 horsepower (212 kW) and is matched with a proven, efficient six-speed automatic transmission. EPA fuel economy estimates will be released later.

Like Sierra's optional 5.3L and 6.2L EcoTec3 V-8 engines, the new V-6 features three state-of-the-art technologies – direct injection, active fuel management (cylinder deactivation) and continuously variable valve timing – that have been proven and perfected through 6 million hours of computational analysis by engineers studying the combustion process. In all, 10 million CPU hours were spent refining and making the most of the Sierra's EcoTec3 engines.

"This is technology no other truck maker can match, and we offer it in every EcoTec3 engines, for every customer," said Jordan Lee, GM Powertrain chief engineer. "It is a standard feature, so our drivers get our best and most sophisticated technology regardless of trim level."

Although they share only a handful of parts with previous Sierra engines, the new EcoTec3 V-6 builds on experience gained from millions of trucks and billions of real-world customer miles resulting from a half-century of leadership in V-6 engine development. In 1960, GMC debuted the first V-6 pickup truck ever and offered it exclusively through most of the '60s.

That engine, offered in various displacements starting at 5.0L, was designed with aluminum pistons, improved cooling and a stout crankshaft and bearings designed for unprecedented durability.

"The family of V-6 engines introduced in 1960 was designed to last, and I've heard of some owners going more than 450,000 miles on the original engine," said Donald Meyer, GMC truck historian. "They had really high torque and pulled loads well. GMC engineers know how to build durable, reliable engines that never quit."

Like the 2014 engine, the 4.3L V-6 introduced as standard equipment for GMC half-ton pickups in 1985 used geometry and engineering from the brand's proven Small Block V-8. As with today's V-6, engineers studied the combustion chamber, developing "Vortec" technology that swirled the air and fuel inside the engine to create a more homogenous mix, improving power and efficiency. That engine was the basis for new generations of engines through the 2013 model year.

2014 Sierra models with the 4.3L EcoTec3 V-6 go on sale later this year with a suggested starting price of $25,085, including a destination charge of $995 but excluding tax, title, license and dealer fees.

GMC has manufactured trucks since 1902, and is one of the industry's healthiest brands. Innovation and engineering excellence is built into all GMC vehicles and the brand is evolving to offer more fuel-efficient trucks and crossovers, including the Terrain small SUV and Acadia crossover. The 2014 Sierra half-ton pickup boasts all-new powertrains and design, and the Sierra Heavy Duty pickups are the most capable and powerful trucks ever built by GMC. Every retail GMC model, including Yukon and Yukon XL full-size SUVs, is now available in Denali luxury trim. Details on all GMC models are available at http://www.gmc.com/, on Twitter at @thisisgmc or at http://www.facebook.com/gmc.


I'm reporting this comment as:

Reported comments and users are reviewed by Autoblog staff 24 hours a day, seven days a week to determine whether they violate Community Guideline. Accounts are penalized for Community Guidelines violations and serious or repeated violations can lead to account termination.


    • 1 Second Ago
  • 125 Comments
      bookemd
      • 1 Year Ago
      I like what GM has here. The cylinder deactivation works (had a 07 Suburban). Really increases mileage on the highway. If I were in the market for a truck, even to pull my boat, I would only look at new V6 trucks (not Ecoboost). I believe they all can pull at least 4800 pounds, and honestly, most people never haul more than that. The power they generate today, is on par with v8s 15 years ago.
        noahbalboa
        • 1 Year Ago
        @bookemd
        Perfect application for an engine like this. If you wanna tow closer to 7k lbs REGULARLY, I'd spring for the 5.3, but the V6 would do perfectly for a small boat.
      Rob
      • 1 Year Ago
      Very happy to see this I'm in work trucks a lot, and the new 3.7 and 3.6L engines from Ford and Dodge have to be wrung out way too hard to get the power you need to haul anything of appreciable size, pass on the freeway or even just driving uphill (F150 in particular will lug then gear-hunt like crazy when you give it more gas on that slope going up TX-2222). Glad to see one of the manufacturers putting in an application-appropriate base engine, even if it doesn't quite meet the EPA numbers that the fuel-sipper small displacement sixes do.
        flynnhadskeath
        • 1 Year Ago
        @Rob
        I think everyone assumed they would follow everyone else's lead and take their 3.6 DOHC passenger car engine and stick it in their truck. They didn't do that. Instead they put a truck engine in their truck. Good call.
          montoym
          • 1 Year Ago
          @flynnhadskeath
          That said, if they were to slip in a TT 3.6L like from the new CTS, that wouldn\'t be all bad either. Then again, if they were to twin-turbo the 4.3L as well..............
        Luke
        • 1 Year Ago
        @Rob
        This engine suffers from a lack of horsepower, much like the Duramax I just hauled a trailer with. This becomes most evident at speed, when you need to be able to pass or pull up a hill. Torque'll get you going, but the horsepower keeps it going. If you're going to tow, just get a V8 and don't whine about the V6's lack of power. The real-world fuel economy really isn't that much different between the two.
          Rob
          • 1 Year Ago
          @Luke
          Funny thing about work trucks, you usually have no say in what you get engine-wise (much less the usual collection of hardhats, skoal cans and McDonald\'s wrappers strewn about the cab). You get what you get because the company got a good deal on em, and 9 times out of 10, that good deal comes with the smallest, cheapest engine the manufacturer makes. I don\'t disagree with your statements, they\'re just not relevant to my point.
          noahbalboa
          • 1 Year Ago
          @Luke
          In what way does this engine lack hp? It is down 20 by the competition, but in a heavier truck, just how much is 20hp going to get you? Besides, a couple of cheap mods will get you some more power (cold air intake, for example).
        transam
        • 1 Year Ago
        @Rob
        That is an advantge of pushrod vs overhead cam. The pushrod makes more low-end power, less need to rev.
      muchdrama
      • 1 Year Ago
      Seems like a goodly amount of power to me.
      domingorobusto
      • 1 Year Ago
      I don't think it's a bad move at all for them to focus on torque for a truck engine. As much as I love the Ford Cyclone engine, it really is better suited to car duty, seeing as you kind of have to wring it out to get at that power. And seeing as it seems to based on LS tech (is it cam-in-block?), it should be very light for it's displacement. Very interesting engine actually...
      Nickoo
      • 1 Year Ago
      Please kill the 3.6L in the camaro and give us this.
      Vincent Teron
      • 1 Year Ago
      Wow. For GM to send out a press release bragging about such a terrible engine is just another example of a half-century's worth failures. They simply can't comprehend that they are, hands-down, the biggest joke of an automobile manufacturer on the planet.
        • 1 Year Ago
        @Vincent Teron
        [blocked]
          • 1 Year Ago
          [blocked]
        flynnhadskeath
        • 1 Year Ago
        @Vincent Teron
        More torque and more towing capacity than the rivals equal terrible engine how?
      merlot066
      • 1 Year Ago
      An engine with 16% more displacement delivers 9% more torque than the F150. Keep up the good work GM...
        Rob
        • 1 Year Ago
        @merlot066
        Do you really think torque and displacement have a perfectly linear relationship, or are you just being dense because you don\'t like GM?
        z28ssx
        • 1 Year Ago
        @merlot066
        You forgot that the GM engine will also be more fuel efficient along with having more torque.
      Steve
      • 1 Year Ago
      3.5L Ti-VCT 4-Valve V6 EcoBoostâ„¢ Horsepower (SAE net@rpm) 365 @ 5000 Torque (lb.-ft. @rpm) 420 @ 2500
      Thomas D Hilton III
      • 1 Year Ago
      i this really something to brag about? i mean its a FREAKIN 4.6 L V6!!!
        noahbalboa
        • 1 Year Ago
        @Thomas D Hilton III
        Well, compared to the competition's V6, it is. It has close to the same amount of power, more torque than any of them (even Nissan and Toyota), probably as good mpg as the Ram 1500 (but only has a 6spd, not 8spd auto), and will be priced very well, as Chevy engines tend to be. You really don't even need a V8 except if you are towing more than 6 or 7k lbs regularly or have a lead foot.
        Thomas D Hilton III
        • 1 Year Ago
        @Thomas D Hilton III
        4.3****
      Daveman 427
      • 1 Year Ago
      A pushrod V6 from GM with good power specs? Why stop at putting them in trucks... its obvious that this engine should be: 1. Turbocharged 2. Put in an all black RWD coupe. Maybe they could put a new body on the Camaro chassis, slap on a Buick badge, stock up alot of black paint and bring back the Darth Vader of cars.
      MAX
      • 1 Year Ago
      Will last like the previous 4.3L V6? I've seen numerous ones over 300k miles.
        kingrat001
        • 1 Year Ago
        @MAX
        The one in my old '88 Blazer went way over 400K and was still running with the original short block in it when it died in 2011. I sold it to a friend with about 50K on it and during the years he had it, it had a transmission rebuild, a head swap for rebuilt ones, like 4 water pumps, and a timing chain, and about 6 batteries. The roof above the windshield area rotted out and it couldn't be driven in any kind of wet weather, so off it went to the junkyard. He's looking for another one out West right now, in Vegas or AZ. If it gets him home, that's all he's asking it to do, and it will be fixed up and his last kid will learn to drive in it, like the first two did. His mom had a '90 that was doing great, but one of the grandkids borrowed it to move one weekend and rolled it going way too fast. She walked away, and the insurance company totalled it. She's 85, and drives a black Trailblazer now. She's one of the few people her age that drives exactly like she did 40 years ago. She gave me a ride home from the ER one day last year, and I told her she drove fine. Her oldest kid is trying to get her to quit. She's a better driver at 85 than that oldest kid is at 62.
      Master Austin
      • 1 Year Ago
      When I hear Chevys 4.3L, the first thing that comes to mind is the loud, raspy, fan roary combination as always, is this still the old tech OHV stuff?
        erjhe
        • 1 Year Ago
        @Master Austin
        Same displacement as before, but this 4.3 has finally been updated to the LS series design or a derivative of it.
          erjhe
          • 1 Year Ago
          @erjhe
          Reading the press release, it seems like this may have more in common with the new LT series engine found in the '14 Vette? Either way, it's not the same 4.3 we're used to seeing. Not by a long shot.
        Julius
        • 1 Year Ago
        @Master Austin
        It's "old tech OHV" in that it's an OHV layout. As for design, it's a cut-down version of the VVT, direct-injected fifth-gen small block/LT1 V8, rather than a cut-down second-generation small block.
        noahbalboa
        • 1 Year Ago
        @Master Austin
        It is based on the OHV design, which isn't much older than OHC design (Peugeot won a race in 1912 with DOHC design). I totally understand the "roar" you are talking about, I imagine that they will have improved it as these trucks are a lot more refined in total (but nobody has heard it yet). Oddly, I've heard a lot of late 90's, early 2000's Ford F150's with the same "roar".
          Rotation
          • 1 Year Ago
          @noahbalboa
          Pushrod design is newer than OHC actually. First it was flatheads (side valve), then OHC, then OHV (pushrod).
    • Load More Comments