I I I I A TM16 005 I I RPO DEFINITIONS I I A I I UP7 RADIO MONO I I I UO1 RADIO STEREO I U52 CLUSTER INSTRUMENT ELECTRONIC DIGITAL I YC5 COMFORT PKG MID LEVEL 1 I YC6 COMFORT PKG LUXURY 2 I I I I I I I 1991 GENERAL MOTORS SERVICE PARTS OPERAT ONS LT TRUCK 52M 1 91 I 16 13 16 000 GROUP