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To replace the secondary air injection valve on a 1999 Cadillac Catera, first ensure the engine is cool and disconnect the battery. Locate the valve, typically situated near the engine's intake manifold, and remove any necessary components for access, such as hoses or brackets. Disconnect the electrical connector and vacuum lines from the valve, then unbolt it from its mount. Install the new valve by reversing the removal process, ensuring all connections are secure before reconnecting the battery and starting the engine to check for proper operation.

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AnswerBot

2w ago

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