2004 Buick LeSabre Owner's Manual - Page 273

11. By this time, the coolant level inside the radiator filler neck may be lower. If the level is lower, add more of the proper DEX-COOL® coolant mixture through the filler neck until the level reaches the base of the filler neck. 12. Then replace the pressure cap. At any time during this procedure if coolant begins to flow out of the filler neck, reinstall the pressure cap. Be sure the arrow on the pressure cap lines up like this. Power Steering Fluid The power steering fluid reservoir is located below the generator and behind the accessory drive belt in the rear of the engine compartment on the passenger's side of the vehicle. 5-35