Yeah I have heard all that clicking and clacking but the fuel pump priming does that sound like a hiss sounds almost and cuts off, that’s the noise I’m trying to figure out it’s right at shut off and hear it when my door opens right at shut off
2021 Silverado RST about 1,800 miles noticed when I shut off there is a vacuum like air sound. Not sure what it is, I shut off radio and A/C and hear it like a poof sound.