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The Gates serpentine belt kit for 2002-2004 Peterbilt 379 with Caterpillar C12 diesel engines is the cataloged replacement intended for accessory drive belt service on those models. Use this kit when performing scheduled maintenance or replacing a worn serpentine belt; it matches the vehicle and engine application shown in the product description.
Gates 02-04 Peterbilt 379 Caterpillar C12 Diesel Serpentine Belt Kit
