2002 Tahoe LT Deck Install ?'s

Hello everyone. Have a 2002 Tahoe LT, Non-Bose With On-Star. I have done a bit of searching on the site and around the web and cant seem to find the right answers. Im trying to put my Kenwood H.U. in. I bought a harness adapter that appears to connect the speaker leads, pwr & gnd, and switch wires. There is also another small (maybe 8wire) plug that goes into the factory deck (no idea what it does(amp maybe) Upon connecting turning the Kenwood deck on, i get no sound - deck works fine, just no sound. I put the factory deck back in and just connected the big plug, radio turns on fine but no sound - when i plug the small 8wire plug in then the sound comes on. I have been reading that there is some kind of data bus & amplifier BS that i have not addressed yet, im guessing thats what my problem is. I bypassed all the factory wiring in my previous Ford Probe GT, so im not opposed to doing it again, but if it is avoidable, i dont want to re-wire. If there is anyone out there who has done an install like this or knows someone who has, please let me know. Also, which parts will i need and where can they be purchased. I am just trying to figure out the cheapest route. (Im sure its the re-wire process). Onstar is not a factor now, can do without. Sorry so lengthy, help if you can. Thank you in advance for your help.

Ok have been scouring posts for a while and came up with one that makes sense. The 2rd connector is for the tape deck (deductive reasoning should have prevailed on that one) The post i read stated that he found the pink wire in the 2nd plug to be the amps remote turn on. I am going to give it a shot and see what happens. Please feel free to respond still, if you have any answers to my dilemma. thanks, ryan

Yep, pink wire on 9 pin plug is amp turn on. Jazzy

Excellent! I had excactly the same question! I want to hook up my Pioneer. Will it be tricky not to use the standard amp?