+3 TENSIONER-SERPENTINE BELT-88-91 (#E20780) IAA4 01328 $137.63 In stock Quantity: 1 Add to Bag Product Details 1988 - 1991 CORVETTE SERPENTINE BELT TENSIONER - NEW. BRAND NEW SERPENTINE ENGINE BELT TENSIONER / IDLER GM PART NUMBER: 10055739 Save this product for later Favorite