03 Grand AM..This is Ridiculous! Please Help!!!!!

only thing I know of is the door chime when replacing the HU. sorry I couldn't be of more help

Give me a sec and I'll post up everything you need to know. GA owner myself so I went through the same crap. No worries though. Plenty of options.

I'm personally using the GMRC-01 at the moment. Here's a link to one on ebay. Their pic only shows the chime box, but I assure you it comes with everything you need other than the antenna adapter. They've treated me fine and I know many other Grand Am owners using the same harness with no issues. This will retain your warning chimes and your ten minute playback with the key off. It will also be 100% plug-n-play. Most listings say it's not compatible with amplified systems, but I also have monsoon and I assure you it's plug-n-play. Scosche also makes one but I think it's more expensive, so I'd stick with the Metra. Here's the antenna adapter you'll want.

You also have the option of a cheap harness. You can use the harness for a sunfire. Metra #70-2003. Here's a link. Two things you have to do to make this work. The stock HU turns on via a signal from the BCM. The more expensive chime harnesses create a new switched source for you, the cheapo harness does not. You'll need to run the red wire on this harness to a new switched power source. If you have the means to check the wires in the ignition harness, there's a switched power source there. Otherwise, you can run the wire to the fuse box on the driver's side of the car and tap into the wipe fuse or any other accessory that only works with the key in "ACC" or "ON". I'm on my second Grand Am now, but I used this cheap harness on the first one. Next thing you need to do is dependent on whether you want to keep monsoon or not. If you plan to bypass all of it, there is no other step. However, if you want to keep it, you'll need to run the blue remote wire from your new deck and tap that into the dark green wire in the stock harness. The dark green wire is the turn on wire for the stock amp so in order for the amp to turn on, you'll need to do this when using the cheap harness.

Any more questions, let me know. I know my way around these cars a bit lol.

whoever said you would lose you cruise control is wrong.....all you would lose is the audio controls on the steering wheel. So the second part is only necessary if you wish to retain your steering wheel controls.

The fawk did you get a $6 harness? Maybe don't be cheap *** and get some half decent stuff.

U will just loose ur chimes everything else will work fine, and nothing wrong with the cheap adapter