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Lesser Sierra HD trims come customary with a 6.6-liter gasoline V8 producing 401 horsepower and 464 lb-ft of torque (unchanged from final 12 months), now routed to an ordinary 10-speed computerized transmission. This V8 delivers extra energy and torque than the usual 6.8-liter V8 within the Ford F-250, and extra torque than the 6.4-liter V8 within the Ram 2500.
Non-compulsory on all trims for round $9,500 (relying on configuration), however customary on the Denali Final, is the 6.6-liter Duramax turbo diesel V8. It now produces 470 hp and 975 lb-ft (up from 445 hp and 910 lb-ft) due to a extra environment friendly turbocharger, improved engine braking from the turbo vane actuator and valve springs, new cylinder heads with improved cooling jackets, and higher-flow injectors with extra injection stress. GMC would by no means quote a 0-60 mph time for such a car, however we managed to get this large truck up to the mark in round six seconds, which is extremely spectacular for its dimension and weight.
Towing is the way more seemingly utility for this engine, and it does not disappoint in that space. The capability modifications a bit relying on cab fashion, however the Sierra 2500 HD can pull as much as 22,500 kilos when geared up with a Max Towing Package deal (21,900 lbs in Crew Cab guise). The GMC can out-tow the Ram 2500, however the Ford F-250 edges it out with a 23,000-pound max capability.
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