Yeah they suck. I called them up and asked them if the PAC OEM-1 would work for my car (1998 grand prix with premium delco system) and they said yes so I ordered one. Well after about 2 weeks of trying different adapters and head scratching and talking to the nice people at clubgp.com it turns out that the OEM-1 will not work because I need to buy an amp. The only positive thing in this is tune town refunded me the full amount.