It stands for Dash Integration Module
i am trying to find out the codes for a 1991 cadillac deville
General Motors (GM)
That's easy! Blue Jay's GM, Stand Pat Gillick
GM plant codes are often referred to as "Cisco codes" due to a historical connection with the company Cisco Systems, which provided the networking infrastructure for GM's plant operations. The term has become synonymous with the codes used to identify different manufacturing plants and their specific operations within GM. This nomenclature reflects the integration of technology and manufacturing processes in the automotive industry.
Reading the codes in a GM is possible without a scantool only through the 1995 model year.
You can get GM fault codes read for free at many auto parts stores, such as AutoZone, O'Reilly Auto Parts, or Advance Auto Parts, where they typically offer complimentary diagnostic services. Additionally, some local mechanics or dealerships may provide free code reading as part of a promotional offer. Many community colleges with automotive programs may also offer free diagnostics performed by students under supervision. Lastly, you can use a free OBD-II scanner if you have access to one, allowing you to read the codes yourself.
Girls' Medium
It stands for gigameter
Don't know what the letters stand for, but I found that suffix here: http://www.nastyz28.com/gm-chevy-codes/chevy-engine-codes-suffix-6.php It shows on the chart what that engine was originally used for.
Mountain GM Henry Because its there
The Pontiac Grand Prix goes by the GM Factory Wire Harness Color Codes. http://www.installdr.com/harnesses/GM-Wiring.pdf
General Motors