Buick Regal: OnStar

 Steering Gear Preload Adjustment Caution

CAUTION: Do not change the steering gear preload adjustment before moving the inner tie rod from the steering gear. Changing the steering gear preload adjustment before moving the inner tie rod could result in damage to the pinion and the steering gear. STEERING WHEEL IN THE FULL TURN POSITION CAUT

 Air Conditioning Compressor Oil Balancing

Draining Procedure NOTE: Drain and measure as much of the refrigerant oil as possible from the rear head ports of the REMOVED compressor. 1. Remove the compressor crankcase oil drain plug from the removed compressor and drain the refrigerant oil from the crankcase into a clean, graduated container