| The
2008 Sierra 2500HD Extended Cab 4WD is a 4-door,
up to 6-passenger full size pickup, available
in 8 trims, ranging from the Work Truck Standard
Box to the SLT Long Box.
Upon introduction, both trims are equipped
with a standard 6.0-liter, V8, 353-horsepower
engine. A 6-speed automatic transmission with
overdrive is standard.
The 2008 Sierra 2500HD Extended Cab 4WD is
a carryover from 2007.
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