5.3 engine oil pan bolt size and length

okay the net is not forthcoming with the sizes involved here---this is part number 453 on the diagram....you can order new pan bolts here~ http://parts.nalleygmc.com/showAssembly.aspx? ukey_assembly=379440&ukey_product=2664838

I'd bring a 1/2 and possibly a 7/16....a 12mm and a 10mm that will cover any sizes used~

take a different bolt off...take it to the parts store and buy several more same grade same length...gonna guess 1/2-20 x 5/8" lg.~

oil gage

oil cage