On my 83 SD, you remove the ashtray, junk collector pocket, then Radio. At the top of the radio slot, there are two screws which fasten the bottom part of the wood face. The five switches at the top come out with the wood face, but not too far. Be careful with pulling out the fiber optic lines to those switches. You may have to unplug and pull each switch to get the wood face out of the way enough. The ACC unit will then be exposed (unlike the SDL version it is not attached to the wood). IIRC there are two screws that hold it in place. I also remember a position adjustment system with these screws. They are in slots with nuts on the other side (I think). Be careful not to lose those nuts or you will either be dissembling more of the console or finding replacment nuts! (don't ask me how I know this!) After they are removed, the unit slides forward. Two large electrical connectors in the back. No vacuum connections. I ended up replacing mine as the fan would just shut off at odd times. I got a rebuilt for about $250. Some folks have been able fix with resoldering contacts (see other topics in this area). If it dosen't work, this proceedure might invalidate it as a core return. While your in there check the function of all of your actuators and switch over valves along the right side of the console below the ACC pusbutton unit. Hope this helps.

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D. Blake
86 300SDL 340K (for sale)
83 300SD 205K (gone)
06 Chevy K3500 LBZ CCLB 50K
94 Chevy K2500 6.5L TD 250K (gone)