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GM Sierra Trailering
Tech Enhances Safety and Performance
systems complement class-leading trailering capability
DETROIT – Six in 10
full-size pickup owners use their trucks for trailering, according to
General Motors’ survey data. Along with class-leading trailing
capacities, the all-new 2014 GMC Sierra 1500 offers that majority of
customers a full suite of trailering technologies that aid everything
from acceleration to safety and braking.
“Trailering is a
fundamental capability that customers invest in and depend on when they
purchase a truck,” said Tony DiSalle, vice president of GMC Marketing.
“The 2014 Sierra backs up its unmatched capability with a host of
ingenious driver aids.”
Before the 2014 Sierra
is even in motion, systems are monitoring conditions and preparing the
truck to perform. On any grade of about 5 percent or higher, Hill Start
Assist automatically engages the Sierra’s brakes for 1.5 seconds or
until the gas pedal is pressed. This keeps the truck from rolling
rearward and helps in trailering situations like climbing a boat launch.
Tow/Haul mode, activated by a button on
the shift lever, modifies the standard six-speed transmission’s shift
mapping to take full advantage of the Sierra’s powerful new EcoTec3
engines. Under acceleration, shift points are higher for more power,
while downshifts are initiated earlier to promote engine braking,
reducing wear on the Sierra’s disc brakes.
With Tow/Haul mode
engaged, Sierra’s Trailer Grade Braking is activated when the driver
lightly applies the brakes. This feature initiates downshifts to assist
with braking on long downgrades. In addition to slowing the vehicle more
efficiently, Auto Grade Braking can reduce brake rotor temperatures by
100 degrees Celsius during a braking event.
For drivers who prefer
full control over their truck’s shifting, improved TapShift controls on
the shift lever are backed by a patent-pending shift algorithm that
improves shift response time by up to 60 percent compared to previous
systems. When the TapShift controls are in use, Sierra’s Trailer Grade
Braking is deactivated because the driver is manually controlling
Trailer Sway Control
works with the Sierra’s standard StabiliTrak to provide the driver with
additional assistance when towing a trailer. When it senses trailer
sway, it intervenes with braking and/or reduced engine power to bring
the trailer under control and keep it on its intended path. It also uses
the electric trailer brakes when a trailer is plugged into the standard
wiring harness of the truck.
Sierra owners can also fine tune a
trailer’s braking performance right from the driver’s seat. With an
available high-mounted Integrated Trailer Brake Controller, the driver
can adjust gain – the level of output to the electric trailer brakes –
via buttons to the left of the steering wheel. System information is
displayed in the Driver Information Center on the instrument cluster.
The Trailer Brake Controller allows owners
to quickly modify trailer braking force based on the weight of a
trailer. For example, a driver delivering heavy building supplies could
adjust the controller to lower trailer gain for an empty trailer on the
return trip, minimizing the chance of trailer wheel lock-up.
The 2014 Sierra’s optional Max Trailering
Package allows trailering up to a class-leading 12,000 pounds with the
optional 6.2L EcoTec3 V-8 engine. The Max Trailering Package is
available on 2WD and 4WD V-8 crew cab and double cab models and
Trailering package with seven-pin and
four-pin connector Enhanced cooling Automatic locking rear differential
Heavy-duty 9.75-inch rear axle with 3.73 ratio Increased-capacity rear
leaf springs Revised shock tuning for increased control Integrated
trailer brake controller. Sierra’s 5.3L EcoTec3 V-8 offers maximum
trailering of 11,500 pounds, more than any competitor. Sierra’s 4.3L
EcoTec3 V-6 can trailer up to 7,200 pounds, 500 pounds more than a Ford
F-150 3.7L pickup and 700 pounds more than a Ram 1500 3.6L.
(May 31, 2013)