To drain the radiator on a 1996 Oldsmobile Achieva, start by ensuring the engine is cool and then place a drain pan under the radiator. Locate the radiator drain plug at the bottom of the radiator and carefully open it to allow the coolant to flow out. If your model doesn't have a drain plug, you may need to remove the lower radiator hose instead. Once drained, close the drain plug or reattach the hose, and refill the radiator with the appropriate coolant.
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