Besides completing other missions, cheats have been an issue. Some of them corrupt your game if you save after using
them. A couple guys know more about this & will probably pop in w/ some helpful info.
BTW, if you reload from an earlier save, here's something you can use. After the firefight in "House Party", there are
several locked Balla cars sitting around the circle including a Tahoma parked right in front of CJ's house. Push it into
your garage & let the door close. Go back to the garage & enjoy your new BULLETPROOF Tahoma.
I did this (PC version 1) & tested it by shooting the gas cap, repeatedly. Keep it in Ganton for dating Denise when the
hood isn't so good.