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,

Well, I called one of the certified Pioneer repair shops in my area. And, they gave me a bag of screws. I got the dash kit screwed in. I will complete the install and ASWC-1 program over the weekend.

That's awesome!