Will bucket seats bolt into a 1990 gmc extended cab 4x4 truck?

It is possible to install bucket seats in a 1990 GMC extended cab 4x4 truck, but it will require some modifications. These are a direct bolt replacement for your original bench seat. You cannot use your original tracks unless you modify them. Bucket seats typically have different mounting brackets and dimensions than bench seats, so the existing seat mounts may need to be modified or replaced. Additionally, the floor pan may need to be modified to accommodate the new seat brackets. It is recommended to seek professional help from a mechanic or auto body shop with experience in this type of modification to ensure proper fitment and safety.