GENERAL INFORMATION Continued To locate the listing of a Part determine the model vehicle and refer to the book under the Group Number identifying it which may be determined by using any of the following three 3 methods 1 Consult Alphabetical Index at front of book which lists parts by noun and descriptive names and refers to the exact Group Number where all parts of similar kind may be found If name of desired part is not really found in the index a correlated Part Name will suggest approximate loca ion 2 Consult Illustrations on which Group Numbers and Noun Name are shown which will refer to the part or assembly wanted On illustrations where both left and right part numbers are listed the first number will designate left hand s de 3 Consult Numerical Index if a Part Number is known and use its Group Number to locate a similar part or be directed to the approximate location of correlated parts The column headed NO USED indicates the number of pieces required The term A R means AS REQUIRED IF BODY IS NOT OFTGENERAL MOTORS MANUFACTURE PLACE ORDERS DIRECT WITH THE MANUFACTURER WHOSE NAME APPEARS ON THE BODY NAME LABEL F 1990 GENERAL MOTORS SERVICE PARTS OPERATIONS LT TRUCK 52S REV 10 90 5