Before you start:
* Safety first: Disconnect the negative terminal of your car battery to prevent accidental shorts.
* Gather tools: You'll likely need a screwdriver (Phillips and/or flathead), possibly a socket wrench with extensions, and potentially some pliers. Check for any retaining clips or bolts that look difficult to remove.
General Steps (assuming a split bench seat):
1. Locate the release mechanisms: These are usually located under the seat cushions themselves, along the seatback, or on the sides of the seat where it meets the car body. They may be levers, knobs, or pull straps. Carefully inspect the seat for any visible catches or buttons.
2. Tilt the seatbacks forward: Most split bench seats have a mechanism to allow you to fold the seatbacks forward. This may require locating additional release levers or handles, typically on the sides of the seatbacks.
3. Remove the seat cushions: Once the seatbacks are forward, lift the seat cushions. There may be clips or hooks holding them in place. Gently pry them up, being careful not to break anything.
4. Unfasten the seatbacks: After lifting the cushions, the seatbacks should be relatively easy to remove. There may be bolts or clips attaching the seatbacks to the car's floor. Look for these carefully. If you find bolts, use the appropriate wrench and carefully remove them. If clips are present, carefully pry them loose.
5. Lift out the seatbacks: Once all the fasteners are removed, carefully lift the seatbacks out of the car. They may be heavy.
General Steps (assuming a single piece back seat):
The process is similar to the split bench seat, but you'll be working with a single larger piece. You will likely have to remove the entire seat in one piece. Pay special attention to where the seat connects to the floor and to the seatbelts. There will likely be more bolts and possibly seatbelt anchors to deal with.
Important Considerations:
* Seatbelts: The seatbelts are likely attached to the seat. Pay close attention to how they are connected and disconnect them carefully. Re-attaching them correctly after reinstalling the seat is crucial.
* Wiring: Some models might have wiring harnesses connected to the seat for heaters or other features. If you find any, disconnect them gently. Take pictures or label the connections to help with reassembly.
* Clips and Fasteners: Be extremely careful when prying or working with clips and fasteners. Many break easily, making reassembly difficult or impossible. Try to work slowly and methodically.
If you're unsure about any step, it's best to consult a repair manual specific to your 1990 Oldsmobile 88 model. You can often find these online (like through Haynes or Chilton) or at auto parts stores. If you're not comfortable performing this task yourself, take your car to a mechanic. Improper removal can damage your vehicle's interior.
