Electronically controled severe duty fan clutch by Hayden. Fits all 2.8L Duramax, including Colorado, Cayon and Express vans. OE replacement, no modification required.
When fully engaged, Hayden Severe duty fan clutches can keep the fan spinning at up tp 90% of shaft speed. This improves airflow through the radiator and around the engine, improving cooling significantly. This is a must have upgrade for those who tow frequently especially up high elevations or in high temperatures.