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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 F55 STS, 2014 Explorer XLT, F-150s
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76,887 Posts
It may depend on which factory radio option is in the car. Anything down in Audio, Video, Security ?
 
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