Join Date: Feb 2009
Location: Largo, FL 33774
Remove the panel under the glove box, the upper seatbelt anchor, the upper B pillar trim (pull out at the bottom, and then down, or you will break the upper clip, and it will not reinstall securely), the sill plate, and the kick panel. The sill and A pillar interlock, so you may have to remove the A pillar trim to get the sill plate loose. You can put the sill plate back in place while you are working on the fan. You need a 7mm socket for the fan. You will also have to move a lot of wires out of the way, but the fan will come out without disconnecting anything else.
You have to open front and rear doors to pull the upper B pillar trim. Be careful with the sill plate. It is weak at the seatbelt bezel. The sill plate is one piece from the A pillar to the C pillar. You can bend it to some extent, but it can break, and usually at the seat belt, in front of the B pillar.
I modded my sill plate with another one, and made a separate front piece shaped like the 94-96 version. Depending on the color of your interior, you may be able to get a ruby red or dark tan set from a 94. If you have DSB, camel, or DMR, you have to make the mod from spares. The sill is the same shape on wagons and sedans.
1991 OCC 461 (.030 over 454) BBC, 3.23 posi, flash to pass, drop spindles & springs, Impala rims, Hydroboost, Recaros, MOMO/wood SW w/QR, custom wood shift knob, Pioneer DEH P77DH
1992 OCC now with 5.7 tbi, DEH P77DH
For a parts list, check https://www.impalassforum.com/vBulle...ion-parts.html