This should help - it's when I did my 88 Monte - but it should be close.
Anyone have a write up on how the dash mounts into place looking to install mine this weekend haven't had any luck on a write up
I'll give it a shot from the write-ups I found and from what I remember.
- Remove the negative battery cable
- Set your front seat(s) all the way back
- If you have a center ash tray - remove it, or if you have a breadbox - remove it
- Pull the A-pillar trim on each side of the windshield - (2) screws on each side. I have a t-top so I had to pull the sun visors, removed the t-tops, and then loosen the front trim to get out the A-pillar trim, there is a screw in the front visor trim where it meets the windshield - be sure to remove these too
- Remove the (2) dash speaker grills by taking out the (2) screws on each. Disconnect the dash speakers on each side
- Undo the brake release handle on the lower left side, it slips out of the mechanism at the end and you also need to pull the yellow plastic thingy out of the little forked prong.
- Take the radio trim off - there are (2) lower screws and (2) upper screws, disconnect the cigarette lighter from the wiring and remove it
- Remove the ac controls and radio - there are (4) 7mm screws holding the ac/heater stuff in, remove the radio, then push the AC control unit into the dash
- Remove the lower steering column cover - there are (4) screws that hold it on, remove these and disconnect the air tube if there is one connected
- Remove the diag port - the computer diag port is screwed in above the transmission hump on the drivers side - again 7mm on these except the ash tray light it just pulls out of a clip(IIRC)
- Remove the gauge pod trim - there are (7) screws that hold the pod trim in. (4) along the bottom and (3) at the top
- There is a remote mirror adjuster on the lower right of the gauge pod trim, with the trim pulled ahead a little you can slide the retaining clip up and off. Then you can move the adjuster lever forward so you can use an allen wrench to release the adjuster from the cable
- Remove the headlight switch - there are (3) 7mm screws holding the headlight switch in, remove those and disconnect the wiring
- Remove the pod There are (4) 10mm nuts holding the pod in
- You need to pull the gauge pod forward to remove the speedo cable and the vss signal wires attached to the speedo. You can reach back and press the tab to release the speedo cable. The vss signal connector screw is 6mm or 9/32nd's or something pretty small
- There are (3) 10mm bolts along the bottom of the dash, one at each end and one in the middle above the transmission hump on the passenger side.
- Disconnect the light inside the ash tray under the dash and the passenger side floor light.
- There are the (4) 7mm screws, (2) in each defroster vent where the dash meets the windshield.
- Lower steering column - there are (2) 15mm nuts that hold the steering wheel column up, remove them and the steering column drops out of the way The dash plate slides between the two metal plates that are there
- Once the dash is loose, you will need to unclip the wiring harness that runs along the center behind it in 2 places above the pod and 1 above the radio area, try not to break the clips if you are going to use a stock style dash or your wiring will hang loose behind the dash and maybe even hang down below the dash in places.
- Remove convenience center wiring - there are (2) 7mm nuts that hold wiring called the convenience center to the dash above the brake release, I did it after moving the dash away from the firewall and getting it from the top
Take your time and watch where stuff goes. The gauge pod was the most time consuming for me. Stuff is brittle and the shift selector slowed me down a bit.