I am wanting to add a LED lightbar to my truck...09 silverado..wt with the LS package. my question is this.. on my last truck(a Dodge ) it had a second plugin under the rear of the truck that was a four wire flat type plug. Does chevy do this also. I have looked breifly but didnt see one?

 

im guessing your talking about a trailer lights hook up..id you have the towing package yours should have it.. yours might have the round 8 pin or 7 pin hookup..something like this...
http://www.titantalk.com/forums/atta...e-30608_c1.jpg if so you can buy a adapter so you can go back to the 4 plug in type