Cadillac Deville The flagship luxury car, offering the class with which the Cadillac has been associated, for decades

91 systems identification

Old 11-03-2018, 12:20 PM
Jumpercableman's Avatar
Junior Member
Thread Starter
Join Date: Nov 2018
Posts: 1
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!
Old 01-26-2019, 11:56 AM
Join Date: Dec 2018
Posts: 34

The 4.9-liter Cadillac engine is a square motor with a 3.623-inch bore and stroke. It features a 9.5:1 compression ratio and a port fuel injection system to generate 200 horsepower at 4,100 RPM and 275 foot-pounds of torque.
Related Topics
Thread Starter
Last Post
Cadillac Escalade
07-22-2018 09:40 AM
General Tech
04-14-2012 12:05 PM
Cadillac Eldorado
03-24-2010 02:19 AM
General Tech
12-31-2009 04:10 AM
Cadillac ESV
01-05-2008 06:46 PM

Thread Tools
Search this Thread
Quick Reply: 91 systems identification

Featured Sponsors
Vendor Directory

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.