Hello, I am attempting to install an AVH-P3200BT in my 03 Sierra. I bought a used head unit that did not come with mounting screws. I downloaded an install manual that tells me to use 5mmx8mm screws to mount it to the dash kit. However, the 5mmx8mm screws are too wide for the mounting holes. I tried 4mmx8mm but they are too small. I tried machine screws. So, what size do I need or is there a different type of screw I need?
Thanks,