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iSimple Connect ISGM655

Premium Bluetooth Smartphone Integration Interface for Select 2003-2012 GM Radios

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iSimple Connect ISGM655

Premium Bluetooth Smartphone Integration Interface for Select 2003-2012 GM Radios


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iSimple Connect ISGM655



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Connect, your Phone, your Car - Wirelessly

Upgrade your car with today’s latest technology and best possible sound quality with this premium integration solution. Enjoy your favorite songs, discover new content with internet radio, and safely manage phone calls, hands-free with a touch of a button. One discrete module hidden in your vehicle seamlessly connects your devices while providing control through your factory radio and steering wheel controls. The Connect’s USB port provides charging and music playback from your smartphone or music playback from a portable USB hard drive or thumb drive.

General Features:

  • Full control for iPhone: Wirelessly (Bluetooth) or Wired (using customer’s Apple USB cable)
  • Basic control for Android: Wirelessly (Bluetooth)
  • USB Thumb-drive support: upto 32GB and upto 8,000 MP3 files
  • 2.1 Amp USB connection for charging of smartphones, tablets, and media players
  • Android audio streaming and wireless track control through Bluetooth connection
  • Built-in Bluetooth for hands-free calling (HFP) and audio streaming (A2DP)
  • Control your media from stereo or steering wheel using Bluetooth Wireless Audio Control (AVRCP)
  • Song text (metadata) on factory radio
  • Auxiliary audio input (3.5mm or RCA)
  • Satellite Radio ready (parts below required, sold separately)
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Compatibility Notes:

  • Vehicle MUST be either equipped with, or have the ability to support Satellite Radio
  • Radio must have a "Band" or "XM" button to be compatible
  • Not compatible in vehicles equipped with "Monsoon" system or any other "signal sensing" amplifier.
  • Not compatible in vehicles equipped with Nav radios that are non-touchscreen.
  • When using the PGHGM5 harness: Some radios may have an inactive satellite radio port if not equipped with a factory satellite radio tuner. Please see a dealer for activation of this port to enable the interface

Compatibility List:

  • Buick:
    • 2005 - 2007 LaCrosse
    • 2004 - 2007 Rainier
    • 2004 - 2007 Rendezvous
    • 2005 - 2007 Terraza
  • Cadillac:
    • 2003 - 2006 Escalade
  • Chevrolet:
    • 2003 - 2006 Avalanche
    • 2003 - 2005 Cavalier
    • 2004 - 2012 Colorado
    • 2005 - 2010 Corvette
    • 2003 - 2005 Impala
    • 2004 - 2005 Monte Carlo
    • 2003 - 2006 Silverado
    • 2007 - 2007 Silverado Classic
    • 2004 - 2006 SSR
    • 2003 - 2006 Suburban
    • 2003 - 2006 Tahoe
    • 2003 - 2009 Trailblazer
    • 2005 - 2009 Uplander
    • 2004 - 2005 Venture
  • GMC:
    • 2004 - 2012 Canyon
    • 2003 - 2009 Envoy
    • 2003 - 2006 Sierra
    • 2007 - 2007 Sierra Classic
    • 2003 - 2006 Yukon
    • 2003 - 2006 Yukon Denali
    • 2003 - 2006 Yukon XL
  • Hummer:
    • 2004 - 2007 H2
    • 2005 - 2009 H3
  • Isuzu:
    • 2003 - 2008 Ascender
  • Oldsmobile:
    • 2003 - 2004 Bravada
    • 2003 - 2004 Silhouette
  • Pontiac:
    • 2003 - 2005 Aztec
    • 2004 - 2005 Grand Am
    • 2005 - 2005 Montana
  • Saab:
    • 2008 - 2008 9-7X

General Features

Type of Factory Radio Improvement Harness
This denotes whether the factory radio improvement module is an add-on tuner for an existing receiver, an FM stereo modulator, a plug-n-play installation harness, or if it is a portable module by itself.
Provides a Charge
This means that the cable will provide a charge to the iPod or iPhone while it is connected. On some cables that provide a charge, a power and ground connection will be required.
Factory Radio Improvement Features
This explains what exactly the unit integrates into your factory stereo. Some kits integrate many different features into your factory radio, while others add only one or two features to your existing factory stereo.
Bluetooth Integration
HD Radio Integration
iPhone 5 Compatible
iPhone 6 Compatible
iPod/iPhone Integration
Provides Auxiliary Input
Provides USB Input
Satellite Radio Integration
Number of Device Connections
This feature tells you how many devices you can connect to the unit at the same time. For example, some units allow you to connect an auxiliary input and an iPod/iPhone connection at the same time!
Compatible Vehicle Make and Model
The model of vehicle that this vehicle specific product is designed for. Please keep in mind that engine variations can affect the compatibility of the products.
Buick Lacrosse
Buick Rainier
Buick Rendezvous
Buick Terraza
Cadillac Escalade
Chevy Avalanche
Chevy Cavalier
Chevy Colorado
Chevy Corvette
Chevy Impala
Chevy Monte Carlo
Chevy Silverado
Chevy SSR
Chevy Suburban
Chevy Tahoe
Chevy Trailblazer
Chevy Uplander
Chevy Venture
GMC Canyon
GMC Envoy
GMC Sierra
GMC Yukon
Hummer H2
Hummer H3
Isuzu Ascender
Oldsmobile Bravada
Oldsmobile Silhouette
Pontiac Aztek
Pontiac Grand Am
Pontiac Montana
Pontiac Sunfire
Saab 9-7

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
4 Star
3 Star
2 Star
1 Star

Average Attribution Rating

The Box Man



June 16, 2015

It was easy to install and works great. I could not be happier!

30 of 36 found this helpful

Was this review helpful to you?


Victoria, MN

Verified Purchase
iSimple Connect ISGM655 (Hummer H2)

August 14, 2016

Overall, I am satisfied with this product; it does what it's suppose to, but that is with a caveat. I own a 2006 Hummer H2, which the box states it will work with, as does the website. That said, make sure that you mount the reset button in a spot that is easy to reach. (I put mine on the left of the center console, & below the ignition key.) I found that if you don't turn off the radio & hit the reset button after you turn off the truck, the truck's electronics will malfunction....truck will not start, or it rough starts & then all of the electronics light up on the dash with warning lights. I did find on another electronic dealer's website that there might be an update for the ISGM655 software, but they won't share it since I did not buy it from them. I have not been able to find a software update from iSimple as it doesn't appear that they sell/manufacture this model any longer. That said, as long as you hit the reset button each time you turn off your truck, it seems to work fine. Just a bit frustrating as I have to remind my wife & the mechanics of this when it's being serviced. If there were an update to fix this, the device would get a 5 star rating from me because it works great otherwise, allowing you to keep the factory radio.

0 of 0 found this helpful

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Accessory Tools and Products

Accessories added

Audiovox ADCR-150-USB

Universal G2 iPod/iPhone Cradle for USB Compatable iPod Interfaces

Your Price $69.99

Audiovox ADCR-200-AVO

Universal G2 iPod/iPhone A/V Cradle for USB Compatable iPod Interfaces

Your Price $59.99

Browse 12 questions and 17 answers
Hide answersShow all answers | Sort by
Why did you choose this?
Sonic Electronix Store
I wanted to keep my factory radio in my 2006 Hummer H2. This seemed like the only product that would allow me to upgrade to "modern" blue tooth, hands free technology in my truck, without having to change out everything.
Ken P on Jul 10, 2016
The 2006 Hummer H2 w/ navigation offers no audio input options (line in) or Bluetooth capabilities. To enjoy the music without removing the factory radio (keeping it original) this seems like the most cost effective-easiest choice.
eric m on Nov 4, 2014
Recently purchased a 2006 Yukon and want the ability to talk over Bluetooth and listen to internet radio or music from my portable devices over the factory radio. I will post a review after receiving the product and installing. My Yukon has the 6 disc factory radio, factory satellite radio, OnStar, and the rear entertainment package.
Jonathan R on Feb 16, 2015
i try to keep my suv original audio system
Carlos A on Oct 22, 2014
Will this work on my 2003 Suburban with the Bose system?
richie on Aug 7, 2014
Best Answer: As long as your system has/supports Satellite radio, the ISGM655 requires your radio to have a 'Band' or 'XM' button to function.
Reply · Report · Corey HStaff on Aug 8, 2014
· Add Answer · I Have This Question Too (3)
Will this system play on all the speakers with factory Bose in chevy silverado? crutch field has a bluetooth for the factory radio but it only plays on the front speakers.
A shopper on Sep 1, 2015
Best Answer: I installed this kit in my 2006 Yukon XL with factory head unit, factory Bose speakers, OnStar, and Rear Entertainment package. This unit plays Bluetooth audio over all my speakers. I have also had very good luck with call quality when using the Bluetooth for a conversation.
Reply · Report · Jonathan R on Sep 1, 2015
· Add Answer · I Have This Question Too (0)
Has anyone used this with ISGM655?
A shopper on Oct 3, 2015
iSimple ISGM655
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Best Answer: This is a great product. It took me about 2 hours to install everything correctly. I haven't had any problems with this product. I have been using it for about 5 months in my 2004 gmc yukon. No issues. Great product.
Reply · Report · Yakeem R on Oct 3, 2015
· Add Answer · I Have This Question Too (0)
I have a 2007 Buick Lacrosse and OnStar is not activated, Does this work without OnStar?
Jane F on Jul 19, 2016
Best Answer: Hello,

I have an 06 with onstar and onstar is not activated either. It works just fine- the only thing is if you have xm satellite radio that will no longer work unless you buy an adapter. Thanks
Reply · Report · Sean L on Jul 19, 2016
· Add Answer · I Have This Question Too (0)
I have a windows phone that supports Bluetooth, Will this support windows HTC phone via Bluetooth?
A shopper on Mar 29, 2016
Best Answer: I cannot speak to the HTC, but I have tried using this with a Nokia Lumina Windows phone. It works fine for call Audio, but it will not stream Media audio. This seems to be an issue with the windows phones because media audio and call audio both work fine with my Galaxy Note 4.
Reply · Report · Alex R on Mar 29, 2016
· Add Answer · I Have This Question Too (0)
Will this fit a 2009 saab 9-7x? It has onstar and dvd and Nav
Rick S on Jan 10, 2016
Best Answer: Hi Rick,

The compatibility list in the description is accurate - that vehicle is not compatible. Unfortunately, there isn't an alternative:

Technical Support:
PHONE: 866-931-8021 (toll free in the U.S.)
727-572-9255 ext.230 (Customers Outside of the U.S.)
Mon-Thurs 9am-7pm EST
Friday 9am-6pm EST
Sat 9am - 7pm EST (Closed Holiday Weekends)
Reply · Report · Rick MStaff on Jan 10, 2016
· Add Answer · I Have This Question Too (0)
Will I have to buy something extra for this ? What is "AVRCP " ?
Control your media from stereo or steering wheel using Bluetooth Wireless Audio Control (AVRCP)
Colin C on Oct 11, 2015
Best Answer: Hello,

It appears that none of our customers have answered your question, so we will; Assuming a compatible vehicle, no other parts are required.

A2DP: Advanced Audio Distribution Profile allows high quality audio to be streamed from an audio device to the car stereo and have control over that stream.
Reply (1) · Report · Rick MStaff on Oct 15, 2015
· Add Answer · I Have This Question Too (0)
Will this work in a Saab 93 linear sedan?
Rob F on Feb 22, 2015
Best Answer: Hello Rob,

Unfortunately, your vehicle is not listed in the compatibility list. You didn't provide us with a YEAR, so we had to check every possible year of the Make/Model, but came up blank. Moreover, no alternate solution was offered, link below.
Reply · Report · Customer SStaff on Feb 22, 2015
· Add Answer · I Have This Question Too (0)
iSimple Connect ISGM655
Premium Bluetooth Smartphone Integration Interface for Select 2003-2012 GM Radios
It says 2003 radios but when your go to details it is not compatible with my 2003 Buick Rendezvous??
Matthew E on Feb 7, 2015
Best Answer: It my Car it works fine, it wasn't difficult and it hasn't given me any problems.
Reply · Report · Carlos A on Feb 7, 2015
· Add Answer · I Have This Question Too (0)
Installed in a 2006 Cadillac Escalade. When plug in my iPhone 5S, it charges the battery, but on my radio screen is says usb for a second, then says disconnected. Getting no music. Turned tuner dial, no different. Is this compatible with iPhone 5s?
Mike N on Jan 7, 2015
Best Answer: Hello Mike,

Please contact Technical Support:

Phone: 866-931-8021 (toll free in the U.S.)
727-572-9255 ext.230 (Customers Outside of the U.S.)
Mon-Thurs 9am-7pm EST
Friday 9am-6pm EST
Sat 9am - 7pm EST
Reply (1) · Report · Customer SStaff on Jan 10, 2015
· Add Answer · I Have This Question Too (0)
I have a 2002 Suburban with factory Radio and Bose speakers, is there a kit available to add Blue tooth to it?
A shopper on Jul 28, 2016
· Add Answer · I Have This Question Too (0)

Product Summary


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Internal SKU


Internal Product ID


Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: iSimple Connect ISGM655