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Shift Interlock System

  1. Note component locations. See SHIFT INTERLOCK SYSTEM COMPONENT LOCATIONS  table. Test shift interlock system. See Fig 1 and Fig 2 .
  2. To determine proper connector identification on shift lock control module and ground connections, see CONNECTOR IDENTIFICATION & GROUND CONNECTION LOCATION  table.
NOTE: Brakelight switch may be referred to as stoplamp switch or cruise stoplamp switch (models with cruise control).
SHIFT INTERLOCK SYSTEM COMPONENT LOCATIONS

Component Location
Brakelight Switch (1) Near Brake Pedal
Fuse Block Near Driver's Side Kick Panel
Junction Block No. 1 Near Driver's Side Kick Panel
Shift Lock Control Module Below Center Console, In Front Of Parking Brake
Shift Lock Control Switch Below Shift Lever
Shift Lock Solenoid Below Center Console, In Front Of Parking Brake
(1) Brakelight switch may be referred to as stoplamp switch or cruise stoplamp switch (models with cruise control).
CONNECTOR IDENTIFICATION & GROUND CONNECTION LOCATION

Component Description
Shift Lock Control Module Connectors
C1 Blue Color With 2 Cavities
C2 Natural Color With 3 Cavities
C3 Black Color With 2 Cavities
Location 
Ground Connections
G201 Near Right Side Of Radio
Fig 1: Testing Shift Interlock System (1 of 2)
G93F24294Courtesy of GENERAL MOTORS CORP.
Fig 2: Testing Shift Interlock System (2 of 2)
G93G24295Courtesy of GENERAL MOTORS CORP.
Fig 3: Shift Interlock System Wiring Diagram
G93H24296Courtesy of GENERAL MOTORS CORP.