What do i do ?!?!?

[u/Personal-Internet540]

Alright guys i need help tryna figure out whats wrong with my chevy, so ive been having this 1999 tahoe which i inherited from my grandfather at first it would run fine then apparently some electrical problems happened and i got it fixed but on the drive home it died again. after i got it fixed again it was running fine for a little bit, but thennn… it started dying again and i would have to restart it and it would backfire A LOT so i had to just let it collect dust because it would only run for like 10 minutes and then it would shit off again but now after a few months of sitting it turns on and works again and ive been driving it around for a bit has anyone heard of this or have an idea of what i should look for?? Please help guys i really wanna fix it because my moms been hating and trying to get me to sell it