To disable the factory security system on a 1999 Pontiac Grand Am, you typically need to pull the fuse for the "Security" system, which is usually located in the fuse box under the dashboard or in the engine compartment. Check the fuse box cover or the owner's manual for the specific fuse number, as it can vary by model. After pulling the correct fuse, the security system should be disabled. Always ensure to replace the fuse after troubleshooting to restore normal functionality.
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