i just bought a used 2005 gxp got rid of my gto for ir and i tell you it was very easy to install a radio in a gto apose to this gaxp i am trying to install my alpine iwa 200 duoble din and i have bought acouple of those modules and none of them work well they do alittle the onstar will work and the rap will work but i get no sound i know the radio is goo i tested it out in another car of mine it seems to me that the monsoon is not sworking with the after market radio i think i have the wrong module the one i am buying say it will work with onstar and bose but we do not have bose we have monsoon if andyone can help and tell me wich module to but or what to do it will be a big help

sory for the spelling i suck at it but o well

thanks

straz

http://www.bonnevilleclub.com/forum/...838&highlight=

Bro same problem here. What modules you have? Are you getting chimes?

Lemme pull up the wiring differences between the Monsoon and the base radio at work today. I'll scan up both diagrams for everyone'* use.

Nobody want'* to see diagrams.

The diagrams you posted are for the 2001 model year. This year used a Bose system, not a Monsoon system. I'm not sure if there is a difference or not, but these diagrams may not help.

i have tryed metra gmc04 and 06 and 09 the module parts works fine the radio shuts off when onstar is pressed and it retains power but no sound thanks guys

They have seemed to have worked for other years in my experience at work.

IMO, worth a shot. I can always find more diagrams.

They appear to be close, although I haven't looked pin for pin. Some of the labels are different than GM'*. Regardless, these are copyrighted and shouldn't be posted here.

You mean GMOS-09?

yes gms09