Curt T-Connectors 55311 new in box, purchased on summit but has the wrong connectors. It's a no-splice 4-way flat trailer wiring connector, says it fits 73-84 Blazer, C/K pickup, Suburban, but did not fit my 1978 Chevy C10. Mine has flat pins instead of the rounded ones, can't find much information on when that changed, maybe for an 80+ or GMT-400? Would just recommended checking your taillight wiring harness against the pictures. Free to a good home if you're near the Raleigh NC area and can pick it up, probably not worth it to ship since it's only like $15 new but could be convinced if someone really wants it.