Jbl radio help

I own a 2008 tundra limited with the non navigation jbl radio. I am looking for a wire harness that will hook up to the factory wire harness. I can only find ones for a non jbl radio. I have found no tutorials on any website for doing a new head unit installation to the jbl wire harness. I want to keep the stock sound system, while adding a self powered 12" sub and a new head unit. I have heard that I might need an interface, but the problem I have is they don't have plugs that match the 5 female plugs in my dash.

 

Well, you are in for some fun. The JBL sound system in a Tundra is trash and if I remember right you need a special converter to make everything work properly with a standard headunit. I believe site vendor tech12volts used to sell the gear you'll need.