1. Preparation:
* Safety First: Disconnect the negative battery terminal to prevent accidental short circuits. This is crucial.
* Tools: You'll likely need a few tools, possibly including: screwdrivers (Phillips and flathead), socket wrenches, and possibly a ratchet. Check for any specific fasteners detailed in your owner's manual.
* Assistance: Having a helper can make the process significantly easier, especially when lifting the seat.
2. Accessing the Fasteners:
* Locate the Fasteners: The backseat is typically secured by bolts or clips. These are usually found underneath the seat, along the seat's attachment points to the car's floor. You'll need to look under the seat cushions and along the sides to find them. Some models may have fasteners accessible from the trunk.
* Remove the Seatback(s): In many cases, the seatback is separate from the bottom cushion. Often, you'll find release levers or knobs. These may be located on the sides of the seatback at the bottom near the seat cushion. They may also be hidden under plastic covers. Release these to fold the seatback forward. If there are no release levers, look for the fasteners attaching the back to the frame.
3. Removing the Bottom Cushion:
* Unfasten the Bolts or Clips: Once the seatback is out of the way, carefully locate and remove the fasteners attaching the bottom cushion to the floor. These are typically bolts or clips. Be gentle to avoid damaging the seat or car interior.
* Lift Out the Cushion: Once all fasteners are removed, carefully lift the bottom cushion out of the car. It might be heavy, so have a helper ready.
4. Important Considerations:
* Headrests: Remove any headrests before attempting to remove the seat.
* Seatbelts: Disconnect the seatbelts at their attachment points if necessary.
* Electrical Connections: Some Bonneville models may have wiring harnesses for seat heaters or other features connected to the backseat. Carefully disconnect these if present; you may need to consult a wiring diagram for your vehicle's year.
* Plastic Trim: There might be plastic trim pieces that need to be carefully removed to access fasteners.
Remember: This is a general guide. The exact procedure will vary depending on the year and model of your Pontiac Bonneville. Always consult your owner's manual for specific instructions and diagrams. If you are unsure about any part of the process, it's best to seek professional help to avoid damage to your vehicle.
