03 avalanche head unit
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=92841
Printed Date: May 10, 2025 at 5:53 PM
Topic: 03 avalanche head unit
Posted By: Alpine Guy
Subject: 03 avalanche head unit
Date Posted: April 11, 2007 at 9:32 PM
I just picked up a 2003 Chevy Avalanche with the blows (Bose) system and I will be just installing a new head unit for now. I picked up a Metra 70-2003 harness today then it occured to me, dough! I need low level signals to the amp's. Do I need a more special harness with RCA inputs or can I solder on some RCA male ends to the Metra harness?
Also, whats this deal with the factory chime? There is some harness thats $100 that my local shop said I did not need unless I wanted the factory chime to warn me if i leave my lights on. Is it recommended to get that harness and return this one?
I have been out of the Audio loop ever since Chevy decided to start doing this set-up.
Of course I did a search, but there was no specific answers I could find.
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2003 Chevy Avalanche,Eclipse CD7000,Morel Elate 5,Adire Extremis,Alpine PDX-4.150, 15" TC-3000, 2 Alpine PDX-1.1000, 470Amp HO Alt.
Replies:
Posted By: Velocity Motors
Date Posted: April 11, 2007 at 10:38 PM
Use the PAC Part Number: C2R-GM24
For most 2001-2003 GM SUV's and trucks. Retains warning chimes when replacing factory radio in vehicles without OnStar®.
• Retains all warning chimes including back-up chimes, memory seats, low fuel, door/hatch ajar and others.
• Provides a +12volt accessory wire.
• Retains RAP (Retained Accessory Power) when key is turned off. Radio stays on until the door is opened or for aproximately 10 minutes.
• Supplied wire harness to connect aftermarket stereo to factory speakers.
• Will work in vehicle that have the factory Bose® amplifier removed or bypassed. Custom wiring is required.
• Buzzer is built into the interface.
If the Bose® amplifier is not used/bypassed, you can use the C2R-GM24 to retain the warning chimes.
Vehicles supported: 2000-2003 Cavalier, Impala, Monte Carlo and Trail Blazer-non-Bose® 2002-2003 Malibu 2002-2003 Envoy SLE-not SLT 2001-2003 Montana and Venture 2003 Avalanche, Express, Silverado, Suburban, Tahoe, Savana, Sierra-not Denali, Yukon SLT and Bravada 2004 Grand Prix GTP Vehicles not support with exception of note: 2003 Hummer H2, Cadillac Escalade and all Denali's 2002-2003 Envoy SLT
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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: Alpine Guy
Date Posted: April 12, 2007 at 10:36 AM
Thanks Jeff, I go ahead and pick that up. looks like the cheapest I can find it for is $70 US, thats pricey! I'll have to suck it up :)
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2003 Chevy Avalanche,Eclipse CD7000,Morel Elate 5,Adire Extremis,Alpine PDX-4.150, 15" TC-3000, 2 Alpine PDX-1.1000, 470Amp HO Alt.
Posted By: kgerry
Date Posted: April 12, 2007 at 10:41 AM
a Metra GMOS-04 should work as well....
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Kevin Gerry
Certified Electronics Technician
MECP First Class Installer
Owner/Installer
Classic Car Audio
since 1979
Posted By: xtremej
Date Posted: April 12, 2007 at 4:14 PM
Metra gmrco-1, will also work.
Posted By: kgerry
Date Posted: April 12, 2007 at 5:25 PM
not if it's amplified... which all Bose systems are......
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Kevin Gerry
Certified Electronics Technician
MECP First Class Installer
Owner/Installer
Classic Car Audio
since 1979
Posted By: xtremej
Date Posted: April 13, 2007 at 8:13 AM
Crap I mis read it though he said non blows, my bad.
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