Engine Cooling Fan Pulley Bracket. FAN PULLEY BRACKET. Radiator Fan Pulley Bracket. 2006 Chevrolet Silverado 3500 Engine: 6.6L V8; Automatic Transmission; TransMfrCode: 1000; TransMfr: Allison;. 2006 Chevrolet Silverado 3500 Engine: 6.6L V8; Manual 6 Speed Transmission;.