ATTENTION CATALOG USER AUGUST 1992 K THIS PARTS AND ILLUSTRATION CATALOG 53M COVERS THE 1990 93 YEAR MODELS M AND L FOR MODEL YEARS 1988 THRU 1989 REFER TO THE 52M DO NOT DISCARD YOUR 52M CATALOG MOST CHARTS HAVE BEEN ELIMINATED PART NUMBERS HAVE BEEN RETURNED TO THEIR GROUP AND OR THE ILLUSTRATION SECTION DETAILS OF KITS ARE FOUND IN THE ILLUSTRATION SECTION FOR 1992 93 ONLY THE FOLLOWING CHART WILL BE FOUND IN THE CATALOG TUNE UP GROUP 2 270 MICROFICHE EFFECTIVE WITH THE MARCH 1992 CATALOG PRINT CYCLE CATALOG DATA ALSO IS AVAILABLE IN A NEW MICROFICHE FORMAT REFERENCE CATALOG DATA IS A SEPARATE FICHE FEATURES INCLUDE IMPROVED FONT FOR BETTER READABILITY LEFT HAND VERTICAL COLUMN DISPLAYS THE FICHE INDEX FOR THAT SPECIFIC FICHE SHEET ALPHABETICAL INDEX GROUP GRID LOCATOR 7 CROSS REFERENCE TEXT TO GRAPHICS GRID LOCATOR CROSS REFERENCE GRAPHICS TO TEXT GRID LOCATOR OUT OF FICHE FRAMES PROVIDES TEXT DATA FOR THOSE GROUPS NOT INCLUDED ON A SPECIFIC FICHE SHEET NAME CHANGES EFFECTIVE WITH 1993 MODEL YEAR CATALOGS GENERAL MOTORS IS CHANGING PART NAMES AND ASSOCIATED DESCRIPTIVE VERBIAGE TO COMPLY WITH A REGULATION REFERRED TO AS THE CLEAN AIR ACT THIS LAW MANDATES THE STANDARDIZATION OF AUTOMOBILE INDUSTRY TERMS FOR ELECTRICAL AND ELECTRONIC EMISSION SYSTEMS AND PARTS z T 1992 GENERAL MOTORS SERVICE PARTS OPERAT ONS L GHT TRUCK 53M 8 92