I have a 03 ssei with monsoon and im trying to replace my head unit and i have been through 3 head units with all correct wiring and remote wires wired up , but the amp is still not powering up and no sound coming through speakers , any help?
I have a alpine radio and a GMOS-09 Harness
Replace Head unit with monsoon amp
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Giangrande99
- LE Member
- Posts: 4
- Joined: Tue Oct 04, 2016 9:50 am
- Year and Trim: 2003 Pontiac Bonneville SSEI
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ddalder
- Resident Gearhead

- Posts: 2599
- Joined: Wed Apr 01, 2009 7:11 pm
- Year and Trim: 2004 GXP, 2008 STS, 2020 XT6
- Location: Alberta, Canada
Re: Replace Head unit with monsoon amp
There was another member many years back that had the same problem with this harness. He had to make an additional connection that was not documented with the product info. I'd have to search around to try and find it, but I believe he did make a post on the board about what was required.

Bose Luxury Sound System w/Touch Screen Navigation, Addition of Factory XM, 2005 MY Antenna, OnStar Upgrade (3G),
RainSense Wipers, Backup Camera, '00 Style Door Panel Courtesy Lights, Heated Washer Solvent, 2X Remote Trunk Release,
Turn Signal Mirrors, Center Console Courtesy Lamp, Rear Outboard Heated Seats, PVD Chrome 18" Factory Rims, Upgraded
Carbon Fibre Appearance Interior Trim, Highly Modified Main Body Harness, Instrument Panel, Door, Door Panel & Headliner
Wiring Harnesses, Custom Fuse Box & Tire and Loading Information Decals, Additional Acoustic Insulation[/size][/color]
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ddalder
- Resident Gearhead

- Posts: 2599
- Joined: Wed Apr 01, 2009 7:11 pm
- Year and Trim: 2004 GXP, 2008 STS, 2020 XT6
- Location: Alberta, Canada
Re: Replace Head unit with monsoon amp
Have a look through this thread... It may offer some insight.
http://www.pontiacbonnevilleclub.com/fo ... 11842.html
http://www.pontiacbonnevilleclub.com/fo ... 11842.html

Bose Luxury Sound System w/Touch Screen Navigation, Addition of Factory XM, 2005 MY Antenna, OnStar Upgrade (3G),
RainSense Wipers, Backup Camera, '00 Style Door Panel Courtesy Lights, Heated Washer Solvent, 2X Remote Trunk Release,
Turn Signal Mirrors, Center Console Courtesy Lamp, Rear Outboard Heated Seats, PVD Chrome 18" Factory Rims, Upgraded
Carbon Fibre Appearance Interior Trim, Highly Modified Main Body Harness, Instrument Panel, Door, Door Panel & Headliner
Wiring Harnesses, Custom Fuse Box & Tire and Loading Information Decals, Additional Acoustic Insulation[/size][/color]

