Cadillac Repair: Cadillac trouble codes, 2003 cadillac cts, cadillac cts

Question
I have a 2003 Cadillac cts and I read codes via the diagnostic connector with my scan tool. I can read the PCM codes but cannot access the BCM, ABS, SIR, etc. codes. Why is it that these codes could be accessed on my 92 Cadiilac via the Climate Control Center (CCC).
Is there any way of accessing these codes without having to buy additional EXPENSIVE scanners?

Answer
yes.

If you are mechanicaly inclined or know of someone who is, You will need a DIGITAL VOLT/OHM METER, Simple electrical schematics, Test procedures and picture locations of the components within the system that is causing you problems of which can't be done on this website which only allows one picture. I do not have a website so you will have to e-mail: onlineautohelp@msn.com in order to obtain the information necessary to fix your vehicle.