I think its called los santos connection where you have to go shoot up these guys, steal the truck for the gps, then drive somewhere else to hack a lap top, then to a hangar at the air port.
smh, man I did that mission by myself on free aim with settings on hard. Made my way to the hangar, and up those stair and blew up all the vehicles. Started to make my way down and it said to kill the target and that he was getting away. I had to fight my way out of the hangar because grangers full of guys kept rolling up repeatedly. Every time I tried to make my way out 3 more would spawn. By the time the coast of clear I ran out and got a buzzard to go after the target. Except by the time I flew pass vespucci beach it said the target has escpaed. Mission failed. Wasted a bunch of ammo, rocket launcher ammo, mini gun etc. all for a measly $200
I was pissed lol.
Since I could launch the game with 1 player I assume it wasn't going to be that hard(never played the mission before). I was dead wrong. Some missions require 2 people and are a cake walk, but this one you can launch by yourself? C'mon R*