1991 c3500 chevy brake hydroboost

Hello, can anyone tell me if i can repair my booster instead of buying the whole thing

this is strictly for things that are for sale or exchange. Moving to appropriate forum...

Rebuilding a brake booster is a bit like rebuilding a steering box. Since its a safety related item, unless you know what you are doing, its best to get a new or professionally rebuilt one.

You do not say what's wrong with yours. If it's just leaking or lacking power, then a rebuild kit (available on line) would do, since it is mostly new seals etc. However, if its a more serious failure, the parts you need may not be in the kit; then a new one is better.