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GMC Syclone: The Story Behind The Classic High Performance Pick-Up TruckWhile GMC's top brass agreed the truck had potential ... in a supercharged 5.3-liter V8 complete with race-inspired performance parts. It's good for 750 horsepower and 600 lb-ft of torque ...
GMC is offering a new engine breathing upgrade ... and Denali trims, and was one of two parts in the Performance Upgrade Package (RPO code PDM). The Performance Upgrade Package also included ...
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