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.
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
camshaft/crankshaft position corellation fault