How to install a line output converter to a stock GM head unit?

line output converter or loc in connected to the radio harness when u have no rca jacks in back of head unitHow to install a line output converter to a stock GM head unit?
you need to buy a high to low converter on one side you have the speaker cable and in the other you have the RCA outputs and second you need to cut off the rear speaker cables and then attached them to the converter. that's the easiest way How to install a line output converter to a stock GM head unit?
Unless your GM radio is a "Bose" type, then you can tap into the factory speaker wiring right behind the radio. Here are the typical wire colors:



left front: tan (+), gray (-)

right front: light green (+), dark green (-)

left rear: brown (+), yellow (-)

right rear: dark blue (+), light blue (-)



The wire pairs should be located next to each other in the factory harness.



You do not have to disconnect the speakers, or cut the speaker wire. If you can strip the wire without cutting it, you can just solder the LOC wiring right into the stock speaker wiring.



In GM vehicles with rear deck speakers, you can usually tap into the rear speaker wiring inside the trunk.

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