2003 Chevrolet Silverado 2500HD Consumer Review: Big Dog Motor Rocks

2003 Chevrolet Silverado 2500HD Extended Cab - Consumer Review

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Big Dog Motor Rocks
By Harpo on


2003 Chevrolet Silverado 2500HD 4dr Extended Cab LS Rwd SB (6.0L 8cyl 5M)


I traded my 94 K2500, 6.5 diesel for
the 8.1 vortex with the Allison tranny
and all I can say is wow!!. The Big
Dog Motor pulls my 5th wheel with no
effort at all especially when it comes
to climbing long......hills. Combined
with the Allison tranny, this is the
best power drive train that a RVer
could dream for save for the Duramax.
I get about 10.5 mpg when towing and
14 mpg when not which is not to bad
with 4.10 gearing. My wife likes the
quiet ride although it's little
stiffer than the old truck (new truck
has the camper package). The 03
exterior stying is Ok but a prefer the
older 02.

Best Features

Power, Power, Power

Worst Features

Need a bigger gas tank option for the 8.1. A 26 gal tank is too small. A 40 plus gal center mounted would do the trick.
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