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1999 SLS
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73 Posts
Discussion Starter #1 (Edited)
Gmrc 03? Gmos 06? I'm going to put a aftermarket head unit in and curious to which harness is the best option. I've read some that the Gmrc isn't great. A friend recommended me the gmos 06 says it does everything needed. Any input will be appreciated. 99 sls.
 

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2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
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It may depend on which factory radio option is in the car. Anything down in Audio, Video, Security ?
 

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2001 Seville STS, 1990 Seville (RIP), 1972 Sedan Deville
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26,323 Posts
Gmos-06.

If you want to retain steering wheel controls, you'll need a separate module. PAC makes one. The new HU must be compatible though.
 

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2001 Seville STS, 1990 Seville (RIP), 1972 Sedan Deville
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26,323 Posts
PAC may make an integration module as well, not sure. Google PAC audio and look on their site.
 
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