iPod and Aux Input Interface Adapter with HD Radio Option for select General Motors GM Class2 Databus Factory Radios with a BAND or XM Button.


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iSimple Gateway ISGM575

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The PAC uPAC-GMC2 interface is a multi input media device compatible with select 2003-2009 GM radios. The 2 Inputs will support any of the following combinations: iPod/Auxiliary, iPod/HD Tuner (Sold Separately), or Auxiliary/HD Tuner. The iPod input can be used as full control from the radio or full control from the iPod. If a factory radio SAT tuner or DVD video system is present, it will continue to operate. The new and expandable interface is the best way to directly connect your iPod/HD Radio/Auxiliary to the factory radio. Interface allows the user to navigate all text right from the radios display. Then, simply add the PAC uPAC-HDRT HD Radio module to enjoy CD Quality music from FM Stations.

Product Features:
  • Multi input media device compatible with select GM Class2 databus radios with a BAND or XM Button
  • 2 Inputs will support the following combinations: iPod/Auxiliary, iPod/HD Radio, or Auxiliary/HD Radio
  • iPod can be used with full control from the radio or iPod
  • View artist and song information on the factory radio's display
  • Browse iPod directly from the radio and/or steering wheel controls
  • Retains factory installed SAT Radio
  • Works with both 6-Disc CD Changer radios and navigation radios
  • Compatible with vehicles with factory Rear Seat Entertainment
  • Does not charge the iPhone 3G, iTouch 2nd Gen, or the Nano 4th Gen
    • The Apple iPhone 3G, iPod Nano 4th Gen, iPod Touch 2nd Gen, and any other newly released iPods can be controlled using the iPod adapter above; however, charging will not be possible unless you purchase the Scosche IFWA PassPORT charging adapter
  • Check the Installation Instructions to see basic instructions for the PAC uPAC-GMC2
  • 1-year warranty
Compatible with the following vehicles:
  • Buick:
    • 2005 - 2007 Allure
    • 2005 - 2007 LaCrosse
    • 2004 - 2005 LeSabre
    • 2004 - 2007 Rainier
    • 2004 - 2007 Rendezvous
    • 2005 - 2007 Terazza
  • Chevrolet:
    • 2003 - 2006 Avalanche
    • 2003 - 2005 Cavalier
    • 2005 - 2007 Colorado
    • 2005 - 2008 Corvette
    • 2003 - 2005 Impala
    • 2003 - 2005 Monte Carlo
    • 2003 - 2006 Silverado
    • 2007 Silverado (Classic)
    • 2004 - 2006 SSR
    • 2003 - 2006 Suburban
    • 2003 - 2006 Tahoe
    • 2003 - 2008 Trailblazer
    • 2005 - 2007 Uplander
    • 2003 - 2005 Venture
  • GMC:
    • 2005 - 2007 Canyon
    • 2003 - 2006 Denali/XL
    • 2003 - 2008 Envoy
    • 2003 - 2006 Sierra
    • 2003 - 2006 Yukon/XL
    • 2007 Sierra Classic
  • Pontiac:
    • 2003 - 2005 Aztek w/ RDS Radio
    • 2003 - 2005 Grand Am w/ RDS Radio
    • 2004 - 2008 Grand Prix
    • 2003 - 2005 Montana
    • 2005 - 2007 Montana SV6
    • 2003 - 2005 Sunfire

Product History:

iSimple ISGM575 thumbnail
(newest, current model)
PAC uPAC-GMC2 thumbnail
(previous model, replaced by iSimple Gateway ISGM575)

Product Features

Type of Auxiliary Input
Some harnesses will add a audio input to a factory stereo, while others will add a video. Some will be able to do both. This is what type of input the harness adds to the factory stereo.
Compatible Vehicle Make
Allows you to view only items that are compatible with your vehicle's make. Does not guarantee that it will work with your vehicle year or model.

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


Roseville, CA

Silverado IPod adapter

January 20, 2011

After I finally got around to installing the PAC adapter - this is great, works as promised. I can plug my satellite radio directly into the 3.5 plug and have my IPod. Wish I had installed it right away.

9 of 11 found this helpful

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Product Summary


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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: PAC uPAC-GMC2

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iPod and Aux Input Interface Adapter with HD Radio Option for select General Motors GM Class2 Databus Factory Radios with a BAND or XM Button.


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