PAC AP4-GM61 AmpPro Car Audio Amplifier Interface For Select GM Vehicles
Mar 17, 2020
AP4-GM61
This product is a must for any GM that has a Bose system (IO5 or IO6). I had an LC2i coming off the subwoofer before and thought it was good. I was missing so much low end (below 40Hz) that I gained from using this. Sound is clean and setup is extremely easy.