Rear axle bolts will not stay tight. Threads on bolts look worn.
My thought is the reason the bolts keep loosening up.

I tried looking for the bolt size on the Chevy Master Manual.
Though I could not find it. The truck is a little over an hour from my house.
If I can not find the exact same length bolt will a longer bolt be ok?
How much extra length will be too long?
Does anyone know of a good source for New bolts?

Does anyone know where I can buy new axle flange gaskets?