Works great - Install very easy (get wire taps and double sided tape to
stick the box somewhere next to the back of the radio) - Settings that
worked for my truck (no XM, no Onstar) - Jumper on XM - Turn on device
connected to your RCA cables, then turn on vehicle. You will see the AUX IN
1 by just pressing the Band button. Installed the Audiovox Movies to Go
DVD system. Kids love it.

After trying 2 FM Transmitters and a Cassette adapter and being completely dissatisfied with the sound quality of all of them, I almost bought a new car stereo. But the thing is, I liked my current car stereo. It's not the best in the world, but it is 200 watts, with 6 speakers, and it sounds pretty darn good. I just really wanted an aux input for my ENV phone and/or IPod. I have a 2003 Pontiac Grand Am and I called a local sound shop and they wanted $250!! for an aux input install. So after cringing at that price I started looking online and found the GM12-aux at Crutchfield. I couldn't be happier! It was like $82 total and I had the instructions on how to remove my dashboard which was very easy, plus their phone support which was awesome as well! Now I don't mess with CDs anymore, my car seems so much cleaner. I simply get in the car, plug my ENV phone into the cable, press the band button on my radio, and I've got crystal clear sound! The hardest part of the install was finding the constant +12 and ground, but crutchfield told me exactly which two wires to tap into for my grand am (black with white stripe = ground, and opposite end of harness thicker orange wire = constant +12 for my grand am). The only thing I'd recommend before starting this is to buy "wire taps" so that you aren't twisting wires together and taping them (like I did :P). But either way works fine. I'm very happy with the gm12-aux and I have no regrets with my purchase or with Crutchfield, great company!

Have had this unit installed in a 2007 silverado 1500 classic crew cab with
bose and XM for over a year with NO PROBLEMS! Sound quality way above
any FM transmitter and just cannot be beat.
I will note that when i installed originally i needed to use the "source"
button on the steering wheel controls to switch between the XM and aux
input source (quick up then down on the button). But that now after
swtiching out the oem XM brain for a Sirius SIR-GM1 unit, i need to use
the "seek" button on the steering wheel. Took me a few hours and a few
wiring checks to figure that out, hopefully i may save someone else some
time!

Connection is fairly simple but it is necessary to splice into the main wiring harness of the truck in order to pull power and a reliable ground. You also have to make sure the jumper is in the right location. Try all three and see which one works. Apparently it's hit or miss because another reviewer reported that he had to use the blank jumper setting in his Sierra; I had to use the Sat Radio jumper.

As all other posts say,Very easy install but crowed in the dash! All went smooth, radio worked,then I tried the A/C. No Fan. checked all fuses/ all good. Turned out I knocked the plug off to the climate control! Just plugged back in and all is well. Next time I will try all function before I put dash back together, not just the radio. This is a great unit. I use it for Sirius Radio
Perfect sound!

I have a 2003 Chevy K2500. Just like described, Band button next to the tunner. Plugged right in the back.

Once I put it all back together the Band rotated through FM1, FM2, AM, and a new AUX1 and AUX2. I am using with my XM Commander. Sound quality is slightly better than the FM modulator. Slightly louder.

It worked great.

Ordered Friday and received Monday......Install was a breeze with my fm/cd/xm delphi stock GM radio....spliced into larger orange power off radio and into black ground pressed cd/aux and BAM instant sound for my zune. I should include that at first the unit did not work as my ground wasn't
sufficient due to all the plastic around even though I
added a large enough washer....had to splice into existing radio ground but works awesome with NO static....sounds even better when the EQ button is enabled on the stock stereo...great product Crutchfield!!!!

This product makes all the difference in the world! Crystal clear sound!

Installation was pretty simple. I own a 2005 Chevy Trailblazer, and taking
the dash off was very easy (instructions that Crutchfield provide for this are
step by step w/ pictures) The only difficult part to the whole install was
deciding where to pull the power and the ground wires from. Since my fuse
box is all the way in the back seat, that wasn't really an option. I have 2
cig lighters directly under the AC controls on the dash... So I took the wires
from the cig lighter and spliced them to use for the AUX input. Worked
beautiful and no stray wires anywhere...

I ran the RCA cable down through an opening at the bottom of the
console/dash and back up under the carpet and plastic to come right out
around the cup holders of the vehicle...

I found a website that I used to help with installation, because it included
step by step pictures. The instructions included from PIE were close to
worthless. If you google it, look for a blog type instruction set... I wish I
could remember what it was, I'd share. Sorry!

Also... it states on the instructions that to toggle between XM and your
iPod, you're supposed to press seek forward twice and back twice or
something like that, well on mine, I have to press seek forward 3 times and
back once, slowly for it to actually toggle. Just play with it before you think
that it doesn't work and take everything apart again! :)

Did the install on a '06 Colorado Crew Cab after being very dissapointed with an FM Transmitter I recently purchased. Took about an hour, not very difficult. I am very happy I finally did away with that awful transmitter. Now I have cd quality from my GPS navigation system with mp3 player (through SD card) and bluetooth so I can hear everyones voice through my speakers. It has been about 1 month so far, problem free.

This is a perfect item for simple iPod playback. It installed easily and quickly, with no effort whatsoever. It works very well with excellent sound through the factory speakers and the selections are all made at the iPod, which is much less confusing than some other accessories. The instructions were complete.
Good choice!