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Home >> GMC >> 1982 >> Magnavan Standard Trans >> Repair and Diagnosis >> Electrical >> Body Electrical >> Speed Control Systems - Automatic >> Adjustments >> Servo Unit

Servo Unit

  1. Disconnect idle stop solenoid. With air conditioning off, adjust engine curb idle speed to 500 RPM. Shut engine off. To check bead chain slack, unsnap swivel from ball stud and pull chain tight.
  2. Center of swivel on chain should extend 1/8" (3.2 mm) beyond center of ball stud. To adjust bead chain slack, remove retainer from chain and swivel. Adjust chain in swivel to remove slack, and re-install retainer.
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