This Dayco Accessory Drive Belt fits your 1978 GMC K25 Suburban 4.8L L6 (Fan and Air Conditioning) and is perfect for a tune up or performance upgrade. .
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Dayco Fan and Air Pump Accessory Drive Belt for 1979 GMC K2500 Suburban 4.8L mk
Dayco Fan and Air Pump Accessory Drive Belt for 1978 GMC G25 4.1L L6 - xa
