How do you add brake fluid to a 2004 grand prix?

To add brake fluid to a 2004 Grand Prix, first locate the brake fluid reservoir, which is typically near the back of the engine bay, near the driver's side. Remove the cap from the reservoir and check the fluid level; if it's low, use the appropriate type of brake fluid (usually DOT 3 or DOT 4) to fill it to the recommended level. Be careful not to spill any fluid on painted surfaces, as it can damage the paint. After adding fluid, securely replace the cap and check for any leaks or issues in the braking system.