One New Aftermarket GM Transmission Oil Cooler Kit 20012005 Silverado, Sierra Tech InfoHEAVY DUTY TRANSMISSION OIL COOLER KIT FOR 20012005 Fits Chevrolet SILVERADO, GMC SIERRA WITH DURAMAX 66L DIESEL ENGINEMOUNTING KIT INCLUDED KIT INCLUDES1SET OF QC ADAPTERS 58 QC x 7814 UNF x 22mm ID FOR YEARS 200120031SET OF QC ADAPTERS 58 QC x 7814 UNF x 21mm ID FOR YEARS 200320051LONG BRACKET2SHORT LBRACKETS8 EACH M6 BOLTS, FLAT WASHERS, LOCK NUTSSEE ATTACHED PDF FILE FOR INSTALLATION INSTRUCTIONSReplaces Part Numbers 89040217, 15170221, 15767445