ATTENTION CATALOG USER OCTOBER 1990 THE FOLLOWING CATALOG CHANGES ARE IN PLACE FOR OCTOBER 1990 EFFECTIVE WITH THE 1991 MODEL YEAR SPO WILL ADHERE TO CORPORATE UNIFORM PARTS CLASSIFICATION UPC FUNCTIONAL NAME ADDRESS FNA STANDARDS PART NAME CHANGES MAY OCCUR TO MEET THE NEW UPC FNA STANDARDS SPECIAL NOTICE THE FOLLOWING CHARTS HAVE BEEN MOVED FROM THE INFORMATION SECTION IN THE PARTS CATALOG TO THE NEW REFERENCE CATALOG 88 ABBREVIATIONS METRIC INFORMATION GM PRODUCTION OPTIONS SERVICE IDENTIFICATION LABELS THE FOLLOWING CHARTS HAVE BEEN MOVED FROM THE INFORMATION SECTION OF THE PARTS CATALOG TO THEIR PRIME GROUP ENGINE I D CODES 00 000 TRANSMISSION I D CODES 04 000 REAR AXLE I D CODES 05 000 FRONT AXLE I D CODES 06 000 THE FOLLOWING CHARTS HAVE BEEN MOVED FROM THE PARTS CATALOG TEXT SECTION T0 THE NEW REFERENCE CATALOG 88 EGR VALVE CHART WIRING HARNESS TAG CHART PAINT CODE CHART WILL BE ADDED TO THE OCTOBER 1990 ISSUE OF THE STANDARD PARTS CATALOG BOOK 89 CONTINUED ON NEXT PAGE 1990 GENERAL MOTORS SERVICE PARTS OPERATIONS LT TRUCK 52S REV 1080