Use the car spawner or use gta san Andreas crazy trainer +151.
Note:the gta san Andreas crazy trainer +151 realy works fine with me.
Note2:my gta san Andreas can't use the car spawner.
I don't think you can
where can i find 18wheels gta
cheat or find it at area 51 or whatever number it is
Go To www.vicolaships.moi.fr hope this does the trick!
Look for question"Where do you tune your car in GTA San ?" you can find it out back there.