I I I GM03 0171 RPO DEFINITIONS I MD9 TRANSMISSIONAUTOMATIC 3 SPEED THM125C BT40 M13 TRANSMISSIONAUTOMATIC 4 SPEED 4T60 E M27 TRANSM SS ON MANUAL 5 SPEED NA5 EMISSION SYSTEM FEDERAL REQUIREMENTS NB2 EMISSION SYSTEM CALIFORNIA REQUIREMENTS ai 1993 GENERAL MOTORS SERVICE PARTS OPERATIONS PONTIAC 25w i n 3 000 GROUP 3 76 6 93