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IN THIS CASE, THE SEQUEL IS EVEN BETTER THAN THE ORIGINAL.
When the combination of the Duramax 6600 Diesel V8 and the Allison 1000 Series
automatic transmission was introduced, it revolutionized diesel power for heavy-duty full-
size pickups. For 2006, that powertrain combination is even better, thanks to the addition of
an extra transmission gear, 50 more horsepower and 45 lb.-ft. more torque. The upgraded
2006 Duramax 6600 Diesel V8 has been significantly revised to deliver lower emissions,
improved quietness, more power and a class-leading 650 lb.-ft. of torque.* The new
transmission is the first six-speed automatic in its class, and it incorporates such leading-
edge features as tap-up/tap-down controls. What is unchanged in the 2500HD and 3500
is their awesome hauling capabilities, with GVWRs that go up to 5171 kg (11,400 lb.)
and GCWRs up to 10,660 kg (23,500 lb.). The most capable pickups in Chevy’s history.
And that’s saying a lot.
*Requires available Allison 6-speed automatic transmission. Based on 2005 Model Year data for GM Large Pickup segment and latest
published competitive information available at time of printing. Excludes other GM vehicles.
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