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Replacing Stock Radio With Upgraded Stock Radio

csonka

By csonka
in Ask A GM Technician

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csonka Enthusiast

csonka

Posted
Posted

I hope you all can help as I have no where to go.

 

I have the base radio, non-mp3 non premium sound (part# 562574 or 22714656)

 

I purchased a factory radio from the internet that has mp3 (part # 15284732), and from a premium system. I had it unlocked.

 

The volume is now only half of what it use to be and it is not putting out the correct frequencies, as it is trying to work for a 7 speaker setup, but i only have a 4 speaker setup. Wiring diagrams for the premium head unit show me that it has low level outputs vs. regular outputs on the base radio which then are split up as high and low outputs for the tweeters and door speakers.

 

 

Is there any way that the dealer could some how reprogram the output levels and tell it that it is connected to a 4 speaker setup and not the 7 speaker setup? I mean, it makes sence to me. There are 3 radios in the 07 lineup, base models 4 speaker, mp3 4 speaker (single or 6disc part# 22714657) and premium mp3 7 speaker (single or 6disc). Could they just load that firmware of the in-between model to the premium radio telling it is a non-amplified 4 speaker setup? There is even a cooling fan on it, so I know there is some amplification going on there before it hits the amp on the outside.

 

I have a 2007 Chevy Cobalt LS. The radio is a little different than the 05-06, especially the harness in the back. I would really appreciate anyone's help! Thanks.

 

 

 

 

 

 

 

22714656 15284732 22714657

-Devil- Enthusiast

-Devil-

Posted
Posted

while talking with a GM tech, today... there are 'some' changes they can make to some oem radio's .. but he wouldn't go into many details .. (my guess would be ohm load adjustments to match pre-amp levels for premium systems as compared to non premium) ...

TexasEdition Enthusiast

TexasEdition

Posted
Posted

The dealer cannot reprogram the radio as far as I know. Your best bet is to buy an aftermarket radio. Most decent radios have mp3 capabilities and also more power than many OEM headunits. Hope this helps.

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