However, if you're determined to do it yourself, here's a *general* outline. This is not specific to a 1990 Buick Century and details will vary. You MUST consult a repair manual specific to your vehicle year and model to get precise instructions and diagrams. These manuals are available online or at auto parts stores.
Steps (General – Consult Your Repair Manual!):
1. Safety First: Wear safety glasses and gloves. The broken glass can be dangerous.
2. Preparation: Park on a level surface and disconnect the battery's negative terminal. This prevents accidental electrical shorts.
3. Interior Removal: You'll likely need to remove interior trim pieces around the window. This often involves unscrewing panels, carefully prying clips, and disconnecting electrical connectors (e.g., for window switches or speakers). Your repair manual will show you exactly which parts need removal.
4. Exterior Removal (if applicable): Some cars require removing exterior trim around the window frame before accessing the window itself.
5. Window Removal: Carefully remove any remaining glass from the frame. This might involve using a tool to cut the remaining sealant if necessary. Be extremely cautious to avoid cutting yourself.
6. Sealant Removal: Remove any old weather stripping and sealant from the window frame. This is crucial for a proper seal with the new window. Use a plastic scraper or similar tool to avoid damaging the frame.
7. New Window Installation: Carefully install the new window into the frame. Ensure it's properly seated. Use new weather stripping if needed.
8. Sealant Application: Apply a bead of automotive-grade window sealant (urethane) along the frame's edges, then carefully press the new window into place. Make sure the sealant makes good contact with the frame and the window. Consult your repair manual for specific sealant application instructions.
9. Reassembly: Reinstall the interior and exterior trim pieces, making sure everything is securely fastened. Reconnect any electrical connectors.
10. Cleaning: Clean up any remaining sealant and glass fragments.
11. Testing: Test the window mechanism to ensure it operates smoothly and the window is sealed properly (no leaks).
Tools You'll Likely Need:
* Repair manual specific to your 1990 Buick Century
* Safety glasses
* Gloves
* Plastic trim removal tools
* Screwdrivers (various types)
* Utility knife or glass cutter (for carefully removing old glass and sealant – use extreme caution)
* Automotive-grade window sealant (urethane)
* Caulking gun
* Putty knife or scraper
* New window
Again, I cannot stress enough the importance of consulting your repair manual and considering professional help. This is a more complex job than it might seem, and improper installation can result in leaks, noise, and potential safety hazards.
