1988 Buick Skyhawk Base, 4D Wagon, AutomaticFACTORY OEM SERVICE PROCEDURE

Crankshaft Position Sensor

Disconnect sensor harness at DIS ignition module. Remove bolt and sensor from engine block. See Figure. Inspect crankshaft sensor "O" ring for wear, cracks or other damage. Replace if necessary. Lubricate new "O" rings with engine oil before installing. To install, reverse removal procedure.

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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