Need to save fuel, we can help your improve the performance of your Chevy / GMC: Full Size Pick Ups, Suburban, Blazer, Jimmy, Yukon Tahoe, Full size Vans G, 1, 2, 3 Class C Motorhomes and improve HP & gas or diesel fuel mileage. An electric engine-cooling fan built for the demands of your big truck, and then some. Restores horsepower by replacing the stock fan, where applicable. Extends water pump life and increases gas mileage. Allows greater control of fan operation. This fan is the answer to the overheating problems caused by slow in-city driving or heavy towing, and solves the cooling problems that occur with body lifts. This unit responds based on cooling need (not just engine speed) to maintain optimum engine temperature. Up to 10 additional horsepower is transferred to the wheels by removing the belt driven fan and fan clutch. Decreased load on the engine results in improved fuel economy - up to 2-3 mpg. Pulls a whopping 2,200 cfm.