GM Factory Integration Adapter General Motors OnStar® data bus interface Retains OnStar and factory door chime with aftermarket radio in select GM vehicles Save with any car stereo Zoom Front Video loading and will display in just a moment. Photos Videos Does it fit my car? Item# 120GMOS01 offer details Item# 120GMOS01 Review Sumary 45 people say In Stock Free Crutchfield lifetime tech support Free Shipping Your price $99.99 Add to cart + Add to wishlist | Email me alerts for this product See related offers and ways to save Get 50% off with any car receiver Special Financing Available Overview Details Customer Reviews Category Info Our take on the GM Factory Integration Adapter by Ken Nail Metra's GM radio replacement adapter lets you replace the factory radio in select OnStar-equipped 2001-up GM vehicles using the existing wiring and connectors. Even if you don't subscribe to OnStar, you'll need this adapter to connect an aftermarket stereo. Hook the GMOS-01 to your aftermarket radio, mount the module, and plug it into the existing factory plug. Get the great sound you want, and keep all important safety features intact. And you can adjust volume settings for OnStar as well as the safety chimes. Also, once you turn off the ignition in these GM vehicles, the radio continues to play until you open the door. This interface maintains that function with your new aftermarket radio. This interface is compatible with select 2001-and up GM vehicles. If you haven't done so already, please enter your vehicle information or call an Advisor at 1-888-955-6000 to find out if this item is compatible with your vehicle. Warranty: 1 year. Note: The GMOS-01 will not work with factory-installed Bose car audio systems. Note: Most vehicles will require additional installation parts — please identify your vehicle if you haven’t done so, then check here for a list of parts. You can also call an Advisor for more information. Hands-on research from the Crutchfield Labs (what are the Labs?) What’s in the box? | In-depth notes Product Research Product Research What's in the box? Download owner's manual GMOS-01 Class II Data Bus interface Wiring harness with 10-pin Molex on one end and bare wires on the other Wiring Harness with 12-pin Molex on one end and 24-pin Molex and 12-pin Molex on the other (plus bare wires) Installation instructions Our Product Research Team At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices. Features Overview: The GMOS-01 lets you install an aftermarket receiver in select late model GM vehicles without losing the OnStar Emergency Services features or the chime that warns the door is open. Please check the Crutchfield Vehicle Selector to confirm compatibility with your vehicle. Note: This adapter is not compatible with factory Bose or Monsoon systems. Connections: The module includes a 10-pin harness (5 pins used) that connects to the switched power and front speaker leads of the new radio. A second harness (12-pin, 10 used) connects the module to the factory OnStar and radio plugs, plus the rest of the wiring for the new radio. Volume: The volume is adjustable for both the OnStar output and the warning chime. Product Reviews Review this product Thanks for taking the time to share your experiences about this product. Please be sure to focus your comments on the product itself. Read our Review Guidelines for more information. Review title * Email * Please include your email* Please enter a valid email address. 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Submit Share this product 1-10 of 45 items >> 10 Per Page 20 Per Page 50 Per Page Sort Results By: Date Reviewed | Rating | Helpfulness 5 out of 5 GM Factory Integration Adapter Written By capnrobi, Tampa FL on Sunday, February 12, 2012 I wonder if it was really necessary. My truck never had OnStar Was this review helpful? Yes | No 3 out of 5 Mostly works Written By AB, Rocky Mount, NC on Saturday, February 04, 2012 Installed in a 2008 Colorado and although most chimes work the way they used to, not all work. Pros: Easy to install. Cons: Not all chimes work correctly. Was this review helpful? Yes | No 3 out of 5 A necessary evil Written By , Greenville SC on Tuesday, January 31, 2012 I hated the thought of spending the extra hundred bucks for this product, but the 50% off with head unit purchase made it palatable. Product works as described when installed properly. Do the splicing work on the bench, rather than in-car. Then, it's just plug-n-play when you go to mount it in the vehicle. The instruction set is minimal but it has all the necessary information. Pros: Works as described. Cons: Expensive but necessary. Was this review helpful? Yes | No 4 out of 5 adapter Written By j g, ft riley ks on Tuesday, January 24, 2012 great price, need to have product Was this review helpful? Yes | No 2 out of 5 GM Factory Integration Adapter Written By ToddG, Potterville, MI on Thursday, January 19, 2012 This item had one glaring problem when used with a 2008 Pontiac Grand Prix: The GMOS-1 would cause the driver's door speaker to make a loud, electrical 'pop' sound everytime you inserted the key into the ignition... or, if the key was in the ignition and you opened the door. It had to do with the GMOS-1 "Chime" function. I switched to the GM VT_GMRC-O1 instead, which has it's own built in 'factory style' chime speaker and then it worked flawlessly. I recommend using the GMRC-01 for this year/make of car. I did not have the Monsoon factory radio setup.... just the standard, run of the mill factory radio which I replaced with a JVC KWHDR720. Pros: Everything worked great.... EXCEPT.... THE CHIME FUNCTION CREATED A STATIC/POP sound when key was inserted into ignition. Was this review helpful? Yes | No 1 out of 5 Major Headache Written By , Oklahoma City, OK on Saturday, December 17, 2011 1. Comes prewired with an additional connector and 3.5mm plug that the directions/pictures don't even address. 2. Lots of wires (not a big deal), throw in less than stellar directions, and you're left wondering. 3. Installation was pretty straight forward, thought I was good to go, worked perfect, until I came out to a dead battery the next day. Traced the problem to this unit feeding constant 12V power to the ACC wire. So the radio was always on. Yes, I double checked my wiring and everything was done according to the directions. The radio receives constant 12V direct from factor harness, but relies on the GMOS01 for the ACC 12V, so the problems was defiantly the unit. Was this review helpful? Yes | No 4 out of 5 Don't Over Think It Written By ag, Charleston, SC on Sunday, November 27, 2011 If a colorblind 22 year old can figure it out working out of the back of his SUV, at night, under a street light, anyone can. Yeah, it's a lot of wires and different colors, but if you match up exactly as the directions say and ignore the wires you don't use, you should be fine. Pros: works well Cons: a little confusing Was this review helpful? Yes | No 4 out of 5 GM Factory Integration Adapter Written By chasjake, Cortland, Ohio on Thursday, October 06, 2011 Used this on a new stereo install in a 2011 Colorado. It works well. The wiring directions / diagram are a little tough to follow but I made it through. The chime is a little more sterile sounding that the factory chimes but who really cares. Was this review helpful? Yes | No 2 out of 5 Unorganized and Bulky! Written By JasonK, Kankakee, IL on Thursday, October 06, 2011 This thing is the most unorganized wiring harness I've ever seen! I took it out of the box and read the instructions for about 45 minutes trying to figure out where the extra black 12pin connector plugged into and the 3.5mm Male. Finally had to call Crutchfield and apparently its for a steering wheel control that's NOT EVEN MENTIONED ONCE in the instructions! Not to mention this thing is HUGE and I have a mid-size truck. Try fitting that in the dash! Was this review helpful? Yes | No 5 out of 5 Just as advertised Written By Johnson, Charleston,. SC on Tuesday, August 30, 2011 Pay attention to the directions and you'll be fine. Lots of wires, but easy to bundle together once all are connected. Made all the connections at the dining room table prior to installation and everything worked as described. Made the after market radio a seamless transition. Didn't need the On Star or amplifier options, so can't comment on them. Was this review helpful? Yes | No 1-10 of 45 items >> Learn more about Factory System Adapters Learn more about Factory System Adapters Car Stereo Installation Guide Car Stereo Installation Guide Robert Ferency-Viars 2/25/2009 based on 342 ratings (61 comments) This installation guide walks you through the process of installing a new in-dash receiver in your car. Introduction to Car Stereo Introduction to Car Stereo Robert Ferency-Viars 2/7/2012 based on 43 ratings A car stereo is the centerpiece of any car audio system. This introduction highlights the stereo's functions and makes it easier to shop for a new one. CD Receivers Shopping Guide CD Receivers Shopping Guide Robert Ferency-Viars 12/10/2011 based on 569 ratings (22 comments) With so many in-dash CD receivers to choose from, how do you pick the right one? Answering these questions below will help you narrow down your choices to get the right CD player for you. Car Stereos FAQ Car Stereos FAQ Crutchfield Writing Team 6/16/2003 based on 30 ratings (11 comments) Answers to common questions about car stereos. Car Stereo Glossary Car Stereo Glossary Crutchfield Writing Team 6/16/2003 based on 15 ratings (4 comments) Learn about the features and specifications found in today's wide variety of CD receivers. Visit our Learning Center to learn more about Factory System Adapters For a more in-depth review and enhanced detailed information on the GM Factory Integration Adapter, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_120GMOS01/GM-Factory-Integration-Adapter.html ).
Our take on the GM Factory Integration Adapter by Ken Nail Metra's GM radio replacement adapter lets you replace the factory radio in select OnStar-equipped 2001-up GM vehicles using the existing wiring and connectors. Even if you don't subscribe to OnStar, you'll need this adapter to connect an aftermarket stereo. Hook the GMOS-01 to your aftermarket radio, mount the module, and plug it into the existing factory plug. Get the great sound you want, and keep all important safety features intact. And you can adjust volume settings for OnStar as well as the safety chimes. Also, once you turn off the ignition in these GM vehicles, the radio continues to play until you open the door. This interface maintains that function with your new aftermarket radio. This interface is compatible with select 2001-and up GM vehicles. If you haven't done so already, please enter your vehicle information or call an Advisor at 1-888-955-6000 to find out if this item is compatible with your vehicle. Warranty: 1 year. Note: The GMOS-01 will not work with factory-installed Bose car audio systems. Note: Most vehicles will require additional installation parts — please identify your vehicle if you haven’t done so, then check here for a list of parts. You can also call an Advisor for more information.
Hands-on research from the Crutchfield Labs (what are the Labs?) What’s in the box? | In-depth notes Product Research Product Research What's in the box? Download owner's manual GMOS-01 Class II Data Bus interface Wiring harness with 10-pin Molex on one end and bare wires on the other Wiring Harness with 12-pin Molex on one end and 24-pin Molex and 12-pin Molex on the other (plus bare wires) Installation instructions Our Product Research Team At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices. Features Overview: The GMOS-01 lets you install an aftermarket receiver in select late model GM vehicles without losing the OnStar Emergency Services features or the chime that warns the door is open. Please check the Crutchfield Vehicle Selector to confirm compatibility with your vehicle. Note: This adapter is not compatible with factory Bose or Monsoon systems. Connections: The module includes a 10-pin harness (5 pins used) that connects to the switched power and front speaker leads of the new radio. A second harness (12-pin, 10 used) connects the module to the factory OnStar and radio plugs, plus the rest of the wiring for the new radio. Volume: The volume is adjustable for both the OnStar output and the warning chime.
5 out of 5 GM Factory Integration Adapter Written By capnrobi, Tampa FL on Sunday, February 12, 2012 I wonder if it was really necessary. My truck never had OnStar Was this review helpful? Yes | No
3 out of 5 Mostly works Written By AB, Rocky Mount, NC on Saturday, February 04, 2012 Installed in a 2008 Colorado and although most chimes work the way they used to, not all work. Pros: Easy to install. Cons: Not all chimes work correctly. Was this review helpful? Yes | No
3 out of 5 A necessary evil Written By , Greenville SC on Tuesday, January 31, 2012 I hated the thought of spending the extra hundred bucks for this product, but the 50% off with head unit purchase made it palatable. Product works as described when installed properly. Do the splicing work on the bench, rather than in-car. Then, it's just plug-n-play when you go to mount it in the vehicle. The instruction set is minimal but it has all the necessary information. Pros: Works as described. Cons: Expensive but necessary. Was this review helpful? Yes | No
4 out of 5 adapter Written By j g, ft riley ks on Tuesday, January 24, 2012 great price, need to have product Was this review helpful? Yes | No
2 out of 5 GM Factory Integration Adapter Written By ToddG, Potterville, MI on Thursday, January 19, 2012 This item had one glaring problem when used with a 2008 Pontiac Grand Prix: The GMOS-1 would cause the driver's door speaker to make a loud, electrical 'pop' sound everytime you inserted the key into the ignition... or, if the key was in the ignition and you opened the door. It had to do with the GMOS-1 "Chime" function. I switched to the GM VT_GMRC-O1 instead, which has it's own built in 'factory style' chime speaker and then it worked flawlessly. I recommend using the GMRC-01 for this year/make of car. I did not have the Monsoon factory radio setup.... just the standard, run of the mill factory radio which I replaced with a JVC KWHDR720. Pros: Everything worked great.... EXCEPT.... THE CHIME FUNCTION CREATED A STATIC/POP sound when key was inserted into ignition. Was this review helpful? Yes | No
1 out of 5 Major Headache Written By , Oklahoma City, OK on Saturday, December 17, 2011 1. Comes prewired with an additional connector and 3.5mm plug that the directions/pictures don't even address. 2. Lots of wires (not a big deal), throw in less than stellar directions, and you're left wondering. 3. Installation was pretty straight forward, thought I was good to go, worked perfect, until I came out to a dead battery the next day. Traced the problem to this unit feeding constant 12V power to the ACC wire. So the radio was always on. Yes, I double checked my wiring and everything was done according to the directions. The radio receives constant 12V direct from factor harness, but relies on the GMOS01 for the ACC 12V, so the problems was defiantly the unit. Was this review helpful? Yes | No
4 out of 5 Don't Over Think It Written By ag, Charleston, SC on Sunday, November 27, 2011 If a colorblind 22 year old can figure it out working out of the back of his SUV, at night, under a street light, anyone can. Yeah, it's a lot of wires and different colors, but if you match up exactly as the directions say and ignore the wires you don't use, you should be fine. Pros: works well Cons: a little confusing Was this review helpful? Yes | No
4 out of 5 GM Factory Integration Adapter Written By chasjake, Cortland, Ohio on Thursday, October 06, 2011 Used this on a new stereo install in a 2011 Colorado. It works well. The wiring directions / diagram are a little tough to follow but I made it through. The chime is a little more sterile sounding that the factory chimes but who really cares. Was this review helpful? Yes | No
2 out of 5 Unorganized and Bulky! Written By JasonK, Kankakee, IL on Thursday, October 06, 2011 This thing is the most unorganized wiring harness I've ever seen! I took it out of the box and read the instructions for about 45 minutes trying to figure out where the extra black 12pin connector plugged into and the 3.5mm Male. Finally had to call Crutchfield and apparently its for a steering wheel control that's NOT EVEN MENTIONED ONCE in the instructions! Not to mention this thing is HUGE and I have a mid-size truck. Try fitting that in the dash! Was this review helpful? Yes | No
5 out of 5 Just as advertised Written By Johnson, Charleston,. SC on Tuesday, August 30, 2011 Pay attention to the directions and you'll be fine. Lots of wires, but easy to bundle together once all are connected. Made all the connections at the dining room table prior to installation and everything worked as described. Made the after market radio a seamless transition. Didn't need the On Star or amplifier options, so can't comment on them. Was this review helpful? Yes | No
Learn more about Factory System Adapters Learn more about Factory System Adapters Car Stereo Installation Guide Car Stereo Installation Guide Robert Ferency-Viars 2/25/2009 based on 342 ratings (61 comments) This installation guide walks you through the process of installing a new in-dash receiver in your car. Introduction to Car Stereo Introduction to Car Stereo Robert Ferency-Viars 2/7/2012 based on 43 ratings A car stereo is the centerpiece of any car audio system. This introduction highlights the stereo's functions and makes it easier to shop for a new one. CD Receivers Shopping Guide CD Receivers Shopping Guide Robert Ferency-Viars 12/10/2011 based on 569 ratings (22 comments) With so many in-dash CD receivers to choose from, how do you pick the right one? Answering these questions below will help you narrow down your choices to get the right CD player for you. Car Stereos FAQ Car Stereos FAQ Crutchfield Writing Team 6/16/2003 based on 30 ratings (11 comments) Answers to common questions about car stereos. Car Stereo Glossary Car Stereo Glossary Crutchfield Writing Team 6/16/2003 based on 15 ratings (4 comments) Learn about the features and specifications found in today's wide variety of CD receivers. Visit our Learning Center to learn more about Factory System Adapters
Car Stereo Installation Guide Car Stereo Installation Guide Robert Ferency-Viars 2/25/2009 based on 342 ratings (61 comments) This installation guide walks you through the process of installing a new in-dash receiver in your car.
Introduction to Car Stereo Introduction to Car Stereo Robert Ferency-Viars 2/7/2012 based on 43 ratings A car stereo is the centerpiece of any car audio system. This introduction highlights the stereo's functions and makes it easier to shop for a new one.
CD Receivers Shopping Guide CD Receivers Shopping Guide Robert Ferency-Viars 12/10/2011 based on 569 ratings (22 comments) With so many in-dash CD receivers to choose from, how do you pick the right one? Answering these questions below will help you narrow down your choices to get the right CD player for you.
Car Stereos FAQ Car Stereos FAQ Crutchfield Writing Team 6/16/2003 based on 30 ratings (11 comments) Answers to common questions about car stereos.
Car Stereo Glossary Car Stereo Glossary Crutchfield Writing Team 6/16/2003 based on 15 ratings (4 comments) Learn about the features and specifications found in today's wide variety of CD receivers.
