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helps deliver smooth and immediate response
firing pressure for strong, smooth performance
and reduced emissions
>
the heavy-duty powertrains
For gasoline users, the standard
Vortec 6.0L V-8 uses an advanced
variable-valve-timing system to
shape power curves to the job.
With models that have less than
a 10,000-lb GVWR,
it is tuned for
1
excellent all-around performance.
With models that have more than
a 10,000-lb GVWR,
the engine is
1
tuned for pulling power, resulting
in a remarkable maximum Gross
T u n e d To maT c h a nT ic ipaT e d wo r k l o a d s ( > 1 0 ,0 0 0 - l b g v w r,
>
high-speed turbo reduces noise and vibration
>
Combined Weight Rating
(GCWR)
3
of 18,500 lbs.
Sierra 2500HD and 3500HD
pickups with the standard Vortec
6.0L V-8 feature the Hydra-Matic
6-speed automatic transmission.
It has two overdrive gears, which
help it offer an excellent balance
of performance and efficiency.
Like the Allison, it has a variety
1
< 1 0 , 0 0 0 - lb g v w r
1
)
> >
of advanced features, including
driver-selectable Tow /Haul mode
to reduce excessive shifting when
towing or hauling a heavy load.
Engine grade braking helps you
maintain control on downhills.
g
g
du r a ma x d i e s e l 6 .6 l v- 8 t u r b o
a l l is o n 10 0 0 6 - s p e e d a u t o mat i c
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