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
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
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