GM Service Manual Online
For 1990-2009 cars only

    Object Number: 863171  Size: SH
  1. Check solenoid connector for open, spread or corroded terminals.

  2. Object Number: 863175  Size: SF
  3. Test solenoid:
  4. 2.1. Remove BTSI solenoid. (Refer to "Brake Transaxle Shift Interlock (BTSI) System" removal procedure in this service manual.)
    2.2. Ground terminal A of the BTSI solenoid and apply 12 volts to terminal B.
       • When 12 volts are applied to the BTSI solenoid, the actuator rod should not be able to move.
       • If the actuator rod can move with 12 volts applied, replace the BTSI solenoid.