yes i do understand the problem and wut u are saying...wut im saying is there might not be a left and right before the amp (but im not 100%) bc i have done this with other cars besides GP's and there were only 2 inputs between the amp and factory head unit so those might not work either.i was just warning him that if splicing either before or after the amp doesnt work, he has to buy a head unit...he can buy an $80 jvc and be fine so maybe just save up?