Use GM Power Steering Fluid no. 1050017 or equivalent. In cold climates use GM Power Steering Fluid no. 12345867/12345866 or equivalent. If you plan to use GM Power Steering Fluid no. 12345867/12345866 or equivalent, you must flush and bleed the system prior to use.
The power steering fluid should be checked at least every 6 months. Power steering fluid level is indicated by marks on a fluid level indicator on the underside of the reservoir cap or by "see-through" marks on the reservoir itself. There is a COLD and a HOT mark on the dipstick. To prevent possible overfilling, check the fluid level only when the fluid has warmed to operating temperatures and the engine is shut OFF . If necessary, add fluid to the power steering pump reservoir.