V I I MX03 011 NOTE 1 1ST DESIGN CONTROLLER HAS 2 CIRCUIT BOARD ECM USED WITH A T MD9 2 39 RATIO PART A NUMBER STAMPED POWER STEERING PRESSURE SWITCH IS NOTREQUIRED NOTE 2 2ND DESIGN CONTROLLER HAS 1 CIRCUIT BOA RD ECM USED WITH A T MD9 2 39 RATIO PART NUMBER STAMPED ALSO USES POWER STEERING PRESSURE SWITCH WITH A C FOR INPUT TO THE J V ECM V 3 1991 GENERAL MOTORS SERVICE PARTS 0PERATIONS BUICK 44W YY I 3 000 GROUP 3 124 I 6 91