Own a 04 QC Hemi. Get exhuast, chip and last mod was cai. Then one to two weeks afterward. After i drive my truck and i turn it off. It had a loud ring sound. A high pitch ring. I can hear it form under the truck but its the loudest when i walk in front of the grill and listen in. Its not real hard to hear and it lasts about a minute. Then goes away. I can't hear it when it's running only when i shut it off. It happened when i was at a dealorship looking at a srt 10 and the sale's man said his does it and its a pressure release for the fuel. I dont know about that or not. Ive never heard it before.. Does anyone else have this problem?

 

Does it only do that when your A/C is on?

 

havn't tried it with the a/c on. its always done it with the a/c off.