GMC 2013 Sierra Options Manual page 20

TransMissions/driVeTrain
a pickup truck's transmission and driveline components are critical to translating every rotation of the engine's crankshaft into power at the drive wheels—
power to tow and haul, power to pass, power to grip snow-covered asphalt or gravel-strewn backroads. GMC sierra offers a range of robust yet refined
transmissions precisely matched to maximize the power delivery, efficiency and load demands of our eight sierra engines.
6
18 | features & Benefits
sierra HeaVY dUTY
ALLISON® 1000 SERIES HEAVY DUTY 6-SPEED
6
6-SPEED AUTOMATIC WITH AUTOMATIC WITH OVERDRIVE
OVERDRIVE How do you handle
sierra Hd's Vortec 6.0l V-8 is mated
the 765 lb-ft of torque produced to a 6-speed automatic with
by sierra Hd's available duramax overdrive built for heavy duty. it's
diesel engine? GMC engineers a sophisticated tool that features
specified the allison 1000 series Tow/Haul mode, driver shift Control
6-speed automatic with overdrive and automatic engine Grade Braking
for its heavy-duty strength and to help you use the full potential of
durability. sierra Hd with confidence.
sierra 1500
6-SPEED AUTOMATIC WITH 4-SPEED AUTOMATIC OVERDRIVE
OVERDRIVE engineered for TRANSMISSION proven in millions
control and confidence in a wide of sierra 1500s, this durable
variety of situations, the 6l80-e 4-speed automatic with overdrive
6-speed automatic is an ideal gives you smooth shifts with
partner for sierra 1500's Vortec the strength of millions of miles
family of gasoline engines. filled of experience. it's engineered
with innovative technology, this with Tow/Haul mode to handle
available transmission can help maximum loads with ease.
you cut steep climbs, long grades
and heavy loads down to size.
all Models
TOW/HAUL MODE To give you
want to slow your sierra, and
when the conditions are met,
more power to accelerate, Tow/
Haul mode raises transmission engages a Grade Braking shift
up-shift points. This feature also schedule that helps you maintain
helps you slow your sierra by your desired speed.
raising downshift points, which
DRIVER SHIFT CONTROL
uses engine compression to
Move through the gears like a
slow your sierra.
manual, with the convenience
AUTOMATIC ENGINE GRADE of an automatic. Move the shift
BRAKING standard with gas-
lever to "M," and you get fingertip
"tap up/down" range control of
engine 6-speed automatic
transmissions, Grade Braking transmission gear selection.
automatically senses when you included with select automatic
transmissions.