Half way thru the 2007 model year
GM released a new body style Silverado/Sierra pick
up truck. In addition to a complete body
change, the trucks received a completely
redesigned interior as well.
applies to both the Chevrolet Silverado
2500HD/3500HD Duramax and the GMC Sierra
2500HD/3500HD Duramax as they are essentially the
same truck with the only differences being name
badging and slight cosmetic differences.
The body changes include widened
fenders with kind of a simulated fender flare
built in to the fender. The front end was
restyled to more of a meaner, bulkier look with a
bigger grill and beefier bumper. The new
design is definitely an improved appearance.
For the most part, the the suspension, chassis and
axles are the same.
The completely redesigned interior
is a major upgrade from the previous body style.
Everything is a new design. The seats are as
comfortable as the previous body style, if not
more comfortable and the interior is quiet with
the exception of an occasional rattle or
vibration, usually while idling in gear. The
layout of the dash and accessories is nicer and on
center console equipped models, they moved the cup
holders to the proper location and have increased
open storage behind the cup holders. Like
these trucks are available with
standard cab, extended cab and a 4 door crew cab
and are available with a multitude of options.
In addition to the options available on previous
models, this new body style seen the introduction
of some new optional features such as remote
start, back up camera, updated Bose stereo system,
updated navigation system, power sliding rear
window, adjustable pedals, park assist and heated
windshield washer fluid. Remote start
equipped vehicles allow remote starting via the
key fob as long as you are within about 100 feet
or so of the vehicle. GM took the remote
start a step further and integrated heat & A/C
functions. When you activate the remote
start, the vehicle will turn on the heater or air
conditioning based on the outside temperature and
if equipped, the driver side heated seat will turn
on also. This is a priceless feature for
those that live in states that have harsh winters.
The mid year (2007.5) was also the introduction of
the LTZ trim level for the pick up trucks.
The LTZ level was the top of the line trim level
which included many high end features such as
leather seats, Bose sound system, etc. The
finish of the interior plastic trim and stereo
buttons seems to be better than previous
years with chipping less of an issue. The
finish on the inner part of the steering wheel
wears off though but is not much of a distraction.
The seats seem to be more durable as well with
seam splitting and tears not as common. Interior storage is
comparable or better to other trucks in the same class.
The glove compartment is typical in size and
center console equipped models have a good sized
storage compartment. The front doors have
storage pockets on the bottom as well as
integrated cup holders at the front of the storage
pockets. The rear doors on extended cab and
crew cab models have storage pockets as well.
Storage under the rear seat is about the same as
previous models, it might actually be a bit less.
Either way, there is still plenty of room under
the seat to keep jumper cables, small tool kit,
blanket, flash light, tow strap, snow brush and a
few other items.
These trucks are still equipped
with the Allison 1000 6 speed transmission which
is now the only transmission offered in the
Duramax pick up trucks. Along with the body
and interior changes was the introduction of the
4th generation Duramax LMM engine.
Power improved slightly to 365hp
@ 3100 - 660ft-lbs @ 1800 rpm. In addition
to the EGR valve and diesel
oxidation catalyst (catalytic converter), the LMM
trucks also have a Diesel Particulate Filter (DPF)
which collects soot and reburns it thru a process
called "active regeneration". This process
drastically reduced soot pollution but also
resulted in decreased fuel economy.
Typical highway fuel economy is
about 20 mpg in stock form which is down a bit
from previous years. I have seen 22 mpg highway with
this model with aftermarket exhaust and a DPF
The engines make great power, appearance is sharp, the interior is
comfortable and the ride is nice for a
heavy duty pick up truck. I was a big fan of
the previous body style and I'm an even bigger fan
of this body style.