Customer Ratings & Reviews

Way better than schoche or metra

Had a schoche one, it started making screeching noises and some times the head unit didn't turn on or shut off when it was suppose to. Although the PAC one has a pretty annoying turn signal noise.

2008 sierra

installed a pioneer 850 bt nav unit into a 2008 sierra truck

Pro, Really like the convenience wires that have the parking brake, speed wire and switched reverse power for the rear view camera!
easy to hook up but make sure you have the many plugs in real tight!

Cons, I hate the sound of the signal light I guess this is necessary? ...it's embarrassing. at least you cant hear it when the music is loud!

pac os-4

it works great, very easy to install. Its been in my 2011 gmc sierra for 6 months now with no problems... if i were to do it again, i wouldnt purchase this, the chime noise for it is beyond annoying and nothing like the stock sound!

Great Product

Works well in my wife's Cadillac DTS.

easy to use no headache an great value

Saves time money on guessing the wires and great for the GMC Acadia and the bose system u will also need vrmd for the monitor in the back and comes pre wire for the steering wheel control and navi.

Very Easy Install

I have a Saturn Vue 2008, and the PAC audio adapter and Steering Wheel controls worked very well to install this and my other radio. For my particular car, however, I was not able to retain factory XM radio functionality. The PAC provides 2 audio RCA plugs (L/R) for the XM, but I am unable to change the stations, so it just stays on the preview station for XM. I docked one feature point for that.

The Onstar remains functional with this, just a simple mute wire going to whatever head unit you use.

No splicing of factory wires. The turn signal chime on my Vue was occasionally not making sounds, but with this, the chime never failed. And, if you don’t want alarm chimes, you can choose not to attach the chime unit.

I’d also recommend buying the PAC Steering Wheel adapter and not mixing with Axxess since this product has the exact plug to use with a PAC adapter so you don’t have to splice additional wires. I tried with two radios, two different steering wheel adapters, and both worked well for their part.

I’m back on the market for a different radio because I wasn’t impressed with features of currently available models, but I’m definitely keeping the PAC adapter for whatever I decide to use.

Love it!

If changing head unit this is a must have, have it in my 07 Yukon Denali & I retained everything, nothing was lost, Onstar, chimes, back up sensors, turn signals, XM, etc..

Ultimate Interface Kit

PAC OS-4 SHOULD BE CONSIDERED THE STANDARD OF THE INDUSTRY.VERY NICE PIECE OF EQUIPMENT.HOOKED UP TO MY DVD
PLAYER AS STATED IN AD.HAS ALL THE EXTRA HOOKUP HARNESSES
YOU MY NEED FOR YOUR APPLICATION BECAUSE THERE ARE SOME
DIFFERENT APPS DEPENDING ON YEAR AND MAKE OF VEHICLE.
I HAVE DONE AT LEAST A FEW HUNDRED INSTALLS PROFESSIONALLY OVER A 30 YEAR PERIOD AND BACK YEARS AGO YOU DID NOT KNOW WHAT YOU MAY GET WHEN ORDERING AN INSTALL KIT.I WOULD RECOMMEND ONE OF THESE TO ANYONE DOING AN INSTALL THAT REQUIRES A SPECIAL KIT LIKE THIS.THE PRODUCT WAS AS THE COMPANY PROMISED AND YOU CAN TAKE THAT TO THE BANK. NO GROUND OR ANY NOISES THAT
CAN RUIN AN INSTALLATION WHEN COMPLETED AND TURNED ON FOR THE FIRST TIME,THANKS FOR READING,ACE.

oac os-4

Works great love it
No problems at all
Easy to install

Great value, works like a charm

I have a 2011 GMC Sierra and I had to get this product in order to have an aftermarket radio and keep my On Star and chimes and such. Overall great product!

Good value

I had the PAC OS-4 installed by a professional. Everything worked as advertised, including OnStar. The only small drawback is the turn signal chime is too loud and quite annoying.

great buy!

Great product works very well. Easy to install in my 2008 Silverado.

excellent product - great value

it works very well, silverado 2010

Great value, works like a charm

I have a 2011 GMC Sierra and I had to get this product in order to have an aftermarket radio and keep my On Star and chimes and such. Overall great product!