2023 Sierra 1500 Elevation with Bose Premium system. First, I'd like to thank all the people that have upgraded their systems, I've learned lots!
- Replaced rear speakers with JL Audio C1-650x coax
- Replaced front door speakers with JL Audio 690tx tr-ax speakers (Crutchfield says "does not fit", but it does. Not sure if front door speakers are full range or not, but I had the speakers already, so I installed them
- Dash speakers are Pioneer TS-A709. They work perfect, just cut off the high-pass filters. You will still hear the phone, signals, etc.
- Still, no base, so I installed a Diamond Audio DPAS10 powered 10 inch subwoofer. The wires to connect to are the blue/grey (left pos) and the Green/Black (left neg) wires, easily accessible on rear passenger side under the door sill . I installed the Bass Control knob on the dash beside the upfitter switches previously installed. Sub fits in the factory option under seat storage, held down with 4 strips of industrial velcro. I will be drilling some holes in the factory storage lid so the "lid rattle" is no longer a problem. Photo below shows the sub install - room on passenger side and some room on driver's side for storage
- I'm still using the factory Bose amp and may replace it in the future, but the set-up so far ROCKS!