Question about 2004 GMC Sierra
Where does the harness attch to the truck?
It plugs into the Mid-BEC. Thats the black electrical box just above your left foot as you sit in the driver's seat. Take the box cover off, and IIRC its the top middle socket. In any case you cant plug the harness into the wrong socket because they're all different configurations.
Posted on Jan 25, 2009
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Posted on Jan 02, 2017
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