1993 Buick Park Avenue Owner's Manual - Page 253

The powertrain control module(PCM), works with a vacuum control to regulate the increased pressure required during specific driving conditions. When this increased pressure or boost, not desired such as during is idling and light throttle cruising, the excess air thatthe Supercharger is pumping is routed through a bypass. All of these controls,working together provide high performance character and fuel efficiency the 3800 in V6 Supercharged Buick engine. The power steering pumpuses a remote reservoir mounted on the throttleand cruise control cable bracket. See "Maintenance Schedule'' in the Index for when you should check the fluid. The supercharged 3800 engine uses two accessory drive belts. One belt drives the generator the power and steering pump. The second belt drives the supercharger, coolant pump and air conditioning compressor. Each belt has its own tensioner and idler pulley. See "Maintenance Schedule'' in the Index for when you should check the accessory drivebelts and supercharger oil level. Have your dealer check the oil level the in supercharger. Engine Oil It's a good idea to check your engine oil every time you get fuel. In order to get an accurate reading, the oil must be warm and the vehicle must be on level ground. The engine oil dipstick is directly behind the engine fan. Turn off the engineand give the oil few minutes a to get back down into the oil pan. If youdon't, the oil dipstick might not&ow the actual level.