GM Introduces New Truck Series and Engines

January 19, 2000
Filed under Trailer News

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General Motors has jumped back into the serious towing arena big-time with the introduction
of its 2001-model Chevrolet Silverado HD and GMC Sierra HD trucks, including 2500- and
3500-series pickups in standard, extended-cab and Crew Cab models — all of which arrive at
dealerships this fall. Tow ratings for the new trucks will range up to 12,000 pounds for
travel trailers and 16,000 pounds for fifth-wheel trailers. The venerable GM 7.4-liter V-8
is being replaced by an all-new Vortec 8100 (8.1-liter) V-8 rated at 340 hp and 455 lb-ft
of torque. On the diesel front, there’s an all-new Duramax 6.6-liter turbodiesel engine
rated at 300 hp and 520 lb-ft. The direct-injected, intercooled Duramax diesel is a joint
venture between GM and Isuzu Motors, and will be built at a new manufacturing facility in
Moraine, Ohio. The current model 6.0-liter Vortec engine is available as the standard
powerplant in the 2001 truck models. Transmissions for the new big-block and diesel engines
include an Allison 1000-series five-speed automatic with overdrive that’s rated to handle
up to 375 hp and 575 lb-ft of torque; gross vehicle weight rating (gvwr) is 19,850 pounds
and the gross combined weight rating (gcwr) is 26,000 pounds. In addition, the big engines
can also be optioned with a new ZF-S6-650 six-speed manual transmission that is designed to
easily handle the 12,000-pound gvwr and 22,000-pound gcwr of the new GM HD trucks.

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