try this:
addEventHandler("onClientGUIClick"GridlOwnerCar,function(button)
if(button)then
local rowindex, columnindex = guiGridListGetSelectedItem ( GridlOwnerCar )
local carname = guiGridListGetItemText ( GridlOwnerCar, rowindex, columnindex)
triggerServerEvent("PCar", localPlayer, carname)
end
end,false)
addEvent("Pincar",true)
addEventHandler("PinCar",root,function(carname)
if(carname=="")then
for i,cars in ipairs(getElementsByType("vehicle")) do
for c,vehicle in ipairs(getVehicleModelFromName(carname)) do
createBlipAttachedTo(vehicle,0,3,0,0,0,0,0,65535,client)
end
end
end
end