GENERAL INFORMATION T4 For a full explanation on decoding the model code and wheelbase refer to the truck series identification chart The following is a list of all the body codes D 103 cab 2 door D 16 lBIazer Jimmy 16 model is w rem h top When using the dimensions and other data shown in the Description Column the parts manager should be guided by the following 1 length overall refers to the total length of a part measured over the longest dimension An irregular shaped piece is measured over the longest dimension regardless of contours and bends 2 dev length refers to the total length of a part such as a tail pipe or gas pipe measured as though the part were straightened out This measurement can be taken on formed pipes by using a string to follow the contours of the pipe and then measuring the length of string used 3 l D refers to inside diameter O D refers to outside diameter O S refers to oversize U S refers to undersize 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 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 lf Name of desired Part is not readily found in the Index a correlated Part Name will suggest approximate location 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 always designate left hand side 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 lf Body is not of General Motors mangacture place gilers direct with the manufacturer whose name appears on the Body N amg gg WAREHOUSING AND DISTRIBUTION DIVISION OF GENERAL MOTORS CORPORATION LT TRUCK 52D 4 REV 10 86