All ActivityMost RecentMost LikesSolutionsGM P30 lug nut sizeHi! I have a 1980 sports coach based on a GM P30 chassis. It has 454 v8, dual rear wheels, front disc/rear drum brakes. what size lug nuts do i need? according to the info i have gathered so far they should be 9/16 18 RH. Im from europe and we have metric size threads here so i have no way to measure the old lug nuts. thanks in advance!Re: 83 GM chassis power steering pumpthank you all for you information! i ordered one from rockauto, hopefully it will perform as it should. does anyone sell a new (not rebuilt) one anymore? or a performance version? @carm: i will se how it will fit when it gets here, ill pm you for pictures if it doesnt fit. thanks!Re: 83 GM chassis power steering pumpok so the chassis designation is a p30? that is great info, thanks! does anyone know if napa might ship internationally?83 GM chassis power steering pumphello everyone, im new to this forum and i have a question to ask. i need a new power steering pump for a 1983 sports coach class A 27' RV. its built on a GM chassis with a 454/th400 and has hydroboost brakes. the old power steering pump is shot and i have no idea which pump it is. it looks a lot like a saginaw pump, but with a remote mounted reservoair. it doesnt have any numbers or other forms of ID stamped on it. does anyone have a clue which pump it might be and where to buy it?