chrisL6983

Ok I've been racking my brains for weeks, can anyone help me please.i have a 2024 gmc sierra with the non bose system in it. I put a separate system in the truck ran 4 subs 4 6.5 mids and 4 tweeters powered by 3 amps and a kenwood headunit. The factory speakers and headunit are all still in place and work just fine but I can't get rid of this engine noise como g from the 6.5 and the subs. I've tried different ground locations I've tried different grou d and power wires, I've tried new rca's , new speakers, swapped headunit,grounded the rca's. Made sure all power li es are ran seperate from rca, I have tried ground loop isolator. This will happen with rca plugged in or unplugged from headunit and amp. I did notice with I touch a grou d wire to the body of the truck it sparks telling me there power going g tonthe body somewhere somehow. This noise wasn't always there when I first installed system with only 2 12's and 2 amps no issue. The noise is mostly coming from the 6.5 and it loud loud please and suggestions are greatly appreciated. System 2 x B2 rage 3100 2ohm 1 channel 1 x DB drive neo4.2 (i believe) 1 is power battery Kenwood dmx907s headunit 4 sundown audio 12's 4 Ds18 6.5 pro 4 db drive tweeters 1/0 off wire for power and grounds 4 sets of rca monster i believe Stock alt Beside the alt/body and truck batter charging rear battery this system is separate from the stock stereo