02' Chevy 2500HD 6.6L ( Troubleshooting )

My truck has been doing fine but this morning when I started the truck to leave the power steering & power brakes weren't working as if the truck wasn't running. I first checked the serpentine belt & it is fine. Is there some kind of fuse/ module/ etc. that could go bad? Has anyone else had this problem & if so please let me know what it was & what should I expect to pay to fix it. Thanks:banghead:

My truck has been doing fine but this morning when I started the truck to leave the power steering & power brakes weren't working as if the truck wasn't running. I first checked the serpentine belt & it is fine. Is there some kind of fuse/ module/ etc. that could go bad? Has anyone else had this problem & if so please let me know what it was & what should I expect to pay to fix it. Thanks:banghead:

Check your powersteering fliud, other than that I suspect your powersteering pump, as you have hydro boost brakes, so if you don't have pressure outta the psteering pump then you won't have brakes either.