When I replaced the POS radio that my Ty came with the OEM one GM offered I was greeted by someone hacking the factory harness up.. I was able to find a place that sells the OEM ends to GM, (atleast for our trucks).. Anyow if Merk cant help ya out lemme know (email me please) and I can get the information.. I dont always get to check on the BBS before a topic expires so if you email me I will be sure to respond.
BTW, these are the ends that would be HARDWIRED to the truck that plug into the OEM slots on the radio.