If you live in a mild, or warm climate use GM power steering fluid, part no. 1050017 or 1052884 or equivalent. If you live in a cold climate, use GM power steering fluid, part no. 12345867 or 12345866 (the system should be drained and refilled before using this fluid) or equivalent.
See Figures 1, 2 and 3
The power steering pump used on models with the 3.8l or 5.7L engine has a remote reservoir assembly. The fluid reservoir cap has a fluid level indicator attached, which shows the fluid level. On vehicles with the 3.4L engine, the fluid reservoir is part of the pump.
Power steering fluid level should be checked at least twice a year. To prevent possible overfilling, check the fluid level only when the fluid has warmed to operating temperatures and the wheels are turned straight ahead. If the level is low, fill the pump reservoir until the fluid level measures between the COLD and HOT marks on the reservoir dipstick. Low fluid level usually produces a moaning sound as the wheels are turned (especially when standing still or parking) and increases steering wheel effort.