2018 Buick Regal BaseFACTORY OEM SERVICE PROCEDURE

Component Testing

  1. Ignition/Vehicle - Off
  2. Disconnect the electrical connector: S3 Transmission Shift Lever
  3. Connect a 3 A fused jumper wire between the test points: Control terminal 4 & 12 V
  4. Momentarily connect a jumper wire between the test points: Ground terminal 2 & Ground

    Verify the component produces a clicking sound: M7 Transmission Shift Lock Control Solenoid Actuator

    • If the component does not produce a soundΒ 

      Replace the component: S3 Transmission Shift Lever

    • Go to next step: If the component produces a soundΒ 
  5. All OK.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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