gmc sierra

I bought a PAC RP5-GM11 to use in installing an aftermarket head unit. The install video I found showed using the RP4-GM11 harness. That harness had four RCA outputs to hook to the Bose amp. The RP5-GM11 harness only has two. From what I'm guessing I should be able to put the two RCA plugs from...

Old setup, not cleaned up, but subs still there