A 1 1 GM REFERENCE 1982 THRU 1990 A RADIATOR CHART CONTINUED PRODUCTION SERVICE PRODUCTION SERVICE PRODUCTION SERVICE PRODUCTION SERVICE RADIATOR NUMBER RADIATOR NUMBER 1 RADIATOR NUMBER RADIATOR NUMBER 1 CODE CODE CODE CODE ZN 03053537 A Z0 03053537 7 Z0 03094191 ZP 03050421 ZR 03049480 1 ZR 03094191 ZS 03055626 ZS 03094188 7 ZT 03055626 ZU 03055626 1 ZX 03049617 7 7 ZY 03053537 ZZ 03053537 i 1990 GENERAL MOTORS SERVICE PARTS 0PERATIONS LT TRUCK 52S t REV 10 90 1 33 7 1 219