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91 systems identification


Old 11-03-2018, 01:20 PM
Jumpercableman's Avatar
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Default 91 systems identification

Recently purchased a 91 DeVille, and while I can find a lot of information, I cannot find a definitive identification of the following systems. I have the owner's manual that is full of "optional equipment" mentions, but I don't know what options were installed. There are a few electrical gremlins that I am working through (no interior/courtesy lights, twilight sensor, ECC, etc), but I need to know what is there to get into details.

Here's a laundry list. Any visual or VIN identification would be a big help.

suspension (air compressor in engine compartment, no obvious internal controls)
remote keyless entry (no unlock button in trunk, illuminated exterior door locks, security light functions)
ABS light (ALDL connections and codes, possibly a good scantool to use other than the cheap ones at autopart stores)

The internet is a great source of information, but it becomes an overload very quickly!

Any help would be greatly appreciated!
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