2014 Silverado Chassis is Foundation for Greater Capability

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Nov 2, 2013 (3 years and 11 months ago)

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2014
Silverado

Chassis is Foundation for Greater Capability




Stronger chassis supports
segment
-
best
11,500
-
pound towing rating



Revised suspension, wider wheels enhance ride and handling



New four
-
wheel disc brakes with Duralife™ rotors improve brake feel a
nd extend
rotor life


SAN ANTONIO



The

2014
Chevrolet
Silverado 1500 was
engineered for improved refinement
and greater capability, with a quieter, more controlled ride, improved steering and braking feel,
and best
-
in
-
class conventional towing rating of u
p to 11,500 pounds.


The stronger chassis
serves as the foundation for suspension, steering and brake
enhancements
including:



Revised c
oil
-
over
-
shock front suspension
contributes
to a smoother ride

and more
responsive handling



Wider rear track
and
tuned
,

multi
-
leaf rear suspension improve ride and handling
performance, especially in turns



Revised

twin
-
tube shock absorbers
feature
new
valving
that

improve
s damping at low
speeds

for a smoother, more controlled ride



Wider wheels


offered in 17
-
, 18
-
, 20
-

a
nd 22
-
inch sizes


reduce tire flex for more
improved cornering performance

(22
-
inch wheels are dealer
-
available accessories)



A l
arger 9.5
-
inch axle
is
standard on V
-
8 models
and is

designed for the higher torque of
the new
EcoTec3 powertrains



New four
-
whe
el
-
disc brake system with Duralife™ brake rotors that offer up to double
the service life, along with brake pedal revisions that improve pedal feel for
stronger
-
feeling, more confident braking performance



Electric, variable
-
assist power steering system enh
ances fuel economy

and tailors
steering assist to vehicle speed




Available Z71 off
-
road package includes GM’s exclusive automatic locking differential
and hill descent control, which improve traction and maneuverability in extreme driving
conditions



Electr
onic vehicle controls including StabiliTrak, trailer sway control and hill start assist
that that make hauling or towing with Silverado easier in the most demandin
g conditions



Integrated trailer brake controller and seven
-
pin wire harness

make hooking up a
nd
towing a trailer easier and safer.


Firmer foundation

A

fully

boxed

frame with the main rails and major cross members formed from high
-
strength
steel provides a rigid base for maximum
hauling capability,
greater
noise and vibration isolation
and excell
ent crashworthiness.


To optimize the strength and refinement characteristics for the four wheelbase lengths in
Silverado’s

lineup, the frame comprises three sections: front bay, mid bay and rear bay. The
front frame bay uses hydroformed
side rails and in
cludes the radiator support cross member,
engine support cross member and front lower control arm cross member. GM pioneered the use
of hydroformed frame rails for full
-
size trucks
nearly 15 years ago
. The process uses highly
pressurized fluid to shape t
he

frame rails, making them stronger and lighter than comparable
welded multi
-
piece components.


A four
-
point, front
-
axle mounting system is integrated with the front bay and uses strong axle
mounting brackets

that
, combined with the front bay’s stiffness,
significantly reduces vibration
.


New,
boxed side rails of the
frame’s
middle bay
are constructed of two pieces of high
-
strength
steel
welded to form the sturdy box design. The rails also have a variable
-
height construction
that enables strategic placemen
t of strength
-
enhancing materials in certain areas
, for a more
integrated, lower
-
mass design.


The side rails
support two stiffness
-
enhancing cross members. Strength is also built into

the
frame by

joining the front bay to the middle bay, with the front b
ay’s hydroformed rails slipping
inside the boxed sections of the middle bay 9.4 inches (240 mm)
, creating a very rigid structure
that resists bending.
It
also helps deliver

excellent crush dynamics
.

The cab foot well area
, for
example,

features an L
-
channe
l design to reduce frame deformation and help prevent the
transfer of
crash
energy into the passenger compartment.


The rear
-
bay boxed rail sections are joined to the middle bay with an overlapping, shingle
-
type
construction. The rear bay section offers en
hanced strength
over the previous model with

four
cross
members
, including a robust fuel tank cross member and a stronger, single
-
piece spare
tire cross member. The rails are thicker where carrying strength is needed and tapered toward
the rear to reduce w
eight and improve
ride characteristics.


Silverado

was

designed for

long cruising distances between fill
-
ups.
Crew
cab,
double
cab and
regular cab/standard box configurations have a 26
-
gallon tank, while
regular
cab/long box
models come with a 34
-
gallon t
ank.


Enhanced

suspensions

and more robust axles

The stiffer chassis enabled more precise tuning of the
front and rear suspensions
, giving the
new Silverado a more responsive feel with smoother performance and less vibration and shake,
particularly on har
sh terrain.


The new Silverado’s driving experience benefits
from
a half
-
inch wider rear track and half
-
inch
wider wheels
all around to

improve stability and ride smoothness. The new geometry also
contributes to flatter, mo
re confident
-
feeling cornering w
hether the truck is empty, loaded or
trailering.
The wider wheels reduce tire flexing and n
ew
-
design twin
-
tube shock absorbers at all
corners improve low
-
speed damping for a smoother, more controlled ride.


All Silverado 1500 models


2WD and 4WD


featur
e an updated coil
-
over
-
shock independent
front suspension design
,

with

forged aluminum upper control arms and cast
-
aluminum lower
control arms
on select models. They
are 23 pounds lighter and 10 percent stiffer

than
comparable steel components
.



The front

suspension also uses new cast
-
aluminum steering knuckles that are 19 pounds lighter
than previous models and deliver comparable stiffness
,
as well as
coil
springs
that
are up to 30
percent stiffer, depending on the model
.

L
arger
-
diameter
stabilizer bars


1.34 inches or
1.42

inch
es with the Max Trailering Package


and enhanced jounce bumpers, spring isolators and
top shock mounts

round out the suspension upgrades.


All of
the new

lighter and stiffer front suspension components contribute to the truck’s sm
oother,
more responsive driving experience.


A true
-
truck Hotchkiss
-
type axle/rear suspension design delivers the load
-
sharing
strength and
flexibility

that truck owners have relied on for decades.
A

lineup of more robust axles is used
with two
-
stage
, se
mi
-
elliptical

multi
-
leaf springs
, complementing

the higher
-
torque powertrains
to deliver maximum strength under load
.
It

includes:



A
n

8.6
-
inch axle with V
-
6 models offered with a 3.23 ratio in 2WD models and a 3.42
ratio with 4WD



A larger, 9.5
-
inch axle is

used with 5.3L and 6.2L V
-
8 models. A 3.08 ratio is standard
with the 5.3L and a 3.42 ratio is standard with the 6.2L and optional with the 5.3L



A high
-
capacity 9.75
-
inch axle is part of the available Max Trailering Package and
features a 3.73 axle ratio.


New bushings for the leaf springs offer a greater balance of compliance and stiffness,
contributing to greater ride quality and enhanced steering responsiveness. Also, new cast
-
aluminum leaf spring spacers and cast iron anchor plates on crew cab and
doub
le
cab
models
save more than

12 pounds (5.6 kg) per vehicle.



The new Silverado’s suspension systems are tailored

for its

range of 17
-
, 18
-

and 20
-
inch
regular
-
production wheels


and 22
-
inch accessory wheels,
delivering an uncompromising
ride
to match i
ts
appearance. The
base
suspension is designed to deliver
a

balance
d

ride whether
the truck is empty, hauling cargo in the pickup box or trailering
, with shocks tuned for the mass
and ride characteristics
of models equipped with larger wheels
.
The 20
-

and
22
-
inch wheels are
constructed with
a
full
-
forming process that makes them stronger and lighter, enhancing the ride
quality with less unsprung weight.


For owners whose work or recreation takes them off road, Z71 returns as a unique model,
with
specific

e
xterior and

interior appointments,
available in LT and LTZ trim
s
.
It

includes

46mm
monotube Rancho shocks



with an enhanced, fade
-
resistant design for more consistent,
smoother performance


front tow hooks, a transfer case
shield on 4WD models

and
availa
ble
unique
1
8
-
inch wheels

with

all
-
terrain tires.
Seventeen
-
inch

wheels are standard

and 20
-
inch
wheels

and all
-
terrain tires

are

also

available.


Hill
d
escent
c
ontrol

and GM’s exclusive automatic locking rear differential (available on other
Silverado mo
dels) are also part of the Z71 package, providing drivers with maximum traction
and optimal vehicle control in extreme conditions. Hill
d
escent
c
ontrol is e
ngaged by the driver
and
uses the anti
-
lock braking system to enable a smooth and controlled descent

in rough
terrain.


The

autom
atic locking rear differential

reacts in milliseconds in low
-
traction situations to improve
safety and confidence on wet, snowy or muddy surfaces. Without driver input of any kind, the

rear axle engages when a wheel speed diffe
rence of 100 rpm or more is detected between the
left and right wheels, providing instant traction for confident driving. During normal driving
conditions, the

differential functions as a conventional light
-
bias limited
-
slip axle.


Max Trailering Package

Trailering is a fundamental capability that customers invest in and depend on when they
purchase a truck
. T
he available Max Trailering Package gives them specialized tools to do it
with confidence. It is available on 2WD and 4WD V
-
8 crew cab and
double
cab

models

and
includes:



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 contr
ol



Integrated brake controller
.


With the Max Trailering Package, the maximum trailering capacity on a 5.3L
-
equipped model
increases
to 11,500 pounds



the highest rating in the segment.


Electric power steering

All models feature new
electric variable
-
assist power steering, which improves overall vehicle
handling and reduces steering effort at low speeds. Because there is no engine
-
driven pump,
electric power steering also
saves fuel

and eliminates the maintenance associated with
hydraulic power steerin
g.


The steering ratio is tailored for each of the Silverado’s four wheelbases, while the variable
assistance
enhances
overall handling with reduced steering effort in parking lots and a higher
rate on the highway that provides a more solid, direct and on
-
center feel.


Longer
-
lasting brake
s

All 2014 Silverado 1500 models have standard four
-
wheel disc brakes


with new
Duralife™

brake rotors that offer up to double the service life



and four
-
channel ABS, for straighter, more
controlled braking in all condi
tions. A revised brake pedal system complements the new brakes
with improved feelings of firmness and smoothness that
give
customers confidence

when they
step on the brake pedal.


The new
Duralife™

brake rotors
enhance braking performance, too,
thanks to

a GM
-
exclusive
process
that protects

ag
ainst rust that, over time, can

lead to steering wheel shudder
. It
involves
super
-
heating the rotors to more than 1,000 degrees F (560 C) for an entire day in a special
oven, where the nitrogen
-
rich atmosphere promot
es nitrogen atoms to bond to the rotors’
surfaces, hardening and strengthening them.


The
larger, vented
front brake rotors measure
13
inches in diameter

and are complemented by
13.6
-
inch rear rotors
. They
’re

optimized
for

the new Silverado’s mass, wider
wheels and
other
new chassis dynamics
. An enhanced brake vacuum pump improves braking capability through
greater brake system boost, while the brake pedal assembly itself is lighter, for a more uniform,
linear feel throughout the entire pedal travel range.



In
short, when the driver steps on the brake pedal, the response is firm, smooth and confidence
-
inspiring.


Silverado also features Auto Grade Braking, which uses the engine and transmission controls to
slow the vehicle on a long downgrade, helping mai
ntain vehicle speed and reducing the need
for the driver to use the brakes.


Electronic v
ehicle control features

StabiliTrak electronic stability control system is standard on all 2014 Silverado 1500 models,
working in concert with the new four
-
wheel
-
disc
brake system and four
-
channel ABS to provide
more precise and controlled ABS stops, greater traction and excellent cornering stability. It also
incorporates rollover mitigation technology, which anticipates tip
-
up conditions


such as
fishtailing


on a fl
at road surface and rapidly applies brake pressure to help reduce the
likelihood of a rollover.


Trailer sway control is
also
standard
and
works with StabiliTrak to provide an added measure of
confidence when towing a trailer. It senses conditions of trai
ler sway and, without input from the
driver, intervenes with braking and/or reduced engine power to bring the trailer under control
and keep it on its intended path. The system will use electric trailer brakes when a trailer is
plugged into the standard wi
ring harness.


Silverado also offers an integrated trailer brake controller and hill start assist, two more
examples of the solutions built into the Silverado that help owners do their work with greater
confidence and less hassle. The trailer brake contr
oller allows the driver to adjust the amount of
output available to the electric trailer brake and to manually apply the brakes, which is very
useful with customers who use their truck regularly to tow loaded and empty trailers back to
back.


With hill st
art assist, the brakes hold for about 1.5 seconds on grades of
5
percent or greater
when the driver takes his or her foot off the brake pedal, preventing rollback
for a more
confident take
-
off

on hilly roads or terrain


especially with a trailer.


Founde
d in 1911 in Detroit,
Chevrolet

is now one of the world's largest car brands, doing business in
more than 140 countries and selling more than
4.5

million cars and trucks a year.

Chevrol
et provides
customers with fuel
-
efficient vehicles that feature spirite
d performance, expressive design, and high
quality. More information on Chevrolet models can be found at
www.chevrol et.com
.



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