Why does the GUI not reappear when I hop back into the vehicle?

So basically I hop into a vehicle, everything works fine, but when I hop out and close the GUI, everything shuts off (Lights, siren), and when I hop back into the vehicle the GUI doesn't appear anymore, even after I respawned it, this also happens to the other vehicles.

wait(0.1)
script.Car.CarSeat.Value = script.Parent
Check = {"Rengate"}
Blacklist = {}
GroupID = 0
Main = script.Parent.Parent.Parent
seat = script.Parent
deletetime = 30
cur = nil
script.Parent.ChildAdded:connect(function(it)
    if it:IsA("Weld") then
        local Part = script.Parent.Parent:GetChildren()
        for i = 1, #Part do
            if Part[i].ClassName == "Part" then
                Part[i].Anchored = false
            end
        end
        timerdebounce = false
        tempcur = it.Part1.Parent
        if cur ~= tempcur and cur ~= nil then tempcur.Humanoid.Sit = false return end
        if cur == tempcur then print("same guy!")return end
        print(tempcur.Name)
        done = false
        cur = tempcur
        local Player = game.Players:GetPlayerFromCharacter(cur)
        for _,i in pairs (Check) do
            if i == Player.Name or GroupID > 0 and Player:IsInGroup(GroupID) or GroupID == 0 then
                done = true
                if Player.PlayerGui:findFirstChild("Car") then
                    done = false
                end
            end
        end
        for _,i in pairs (Blacklist) do
            if cur.Name == i then
                done = false
            end
        end
        if done == false then
            Player.Humanoid.Jump = true
            cur = nil
            Player = nil
            print(tempcur.Name.." was booted")
            script.Parent.Parent.Parent = Main
            script.Parent.Parent.InUse.Value = false
        else
            script.Car:Clone().Parent = Player.PlayerGui
            script.Parent.Char.Value = Player
            game.Players:GetPlayerFromCharacter(cur).PlayerGui.Car.Frame.Seat.Value = script.Parent
            game.Players:GetPlayerFromCharacter(cur).PlayerGui.Car.Frame.LocalScript.Disabled = false
            script.Parent.Parent.Parent = Main
            script.Parent.Parent.InUse.Value = true
            timerdebounce = false
        end
    elseif it:IsA("IntValue") then
        print("Bye Bye user!")
        cur = nil
        Player = nil
        script.Parent.Parent.Parent = Main
        script.Parent.Parent.InUse.Value = false
        timerdebounce = true
        starttimer()
    end
end)

game.Players.ChildRemoved:connect(function(bye)
    if bye == script.Parent.Char.Value then
        timerdebounce = true
        starttimer()
    end 
end)

script.Parent.ChildRemoved:connect(function(hi)
    if hi:IsA ("Weld") then
        local Part = script.Parent.Parent:GetChildren()
        for i = 1, #Part do
            if Part[i].ClassName == "Part" then
                Part[i].Anchored = true
            end
        end
            if script.Parent.Park.Value == false then
                timerdebounce = true
                starttimer()
            elseif script.Parent.Park.Value == true then
                timerdebounce = false
        end
    end
end)

function starttimer()
    for i = deletetime,0,-1 do
        pcall(function()if i <= 30 then
            script.Parent.Parent.Body.Time.Timeout.TextLabel.Text = i
            script.Parent.Parent.Body.Time.Timeout.Enabled = true
        end end)
        wait(1)
        if not timerdebounce then break end
    end
    pcall(function()
        script.Parent.Parent.Body.Time.Timeout.Enabled = false
    end)
    if timerdebounce then
        wait(0.5)
        script.Parent.Parent:Destroy()
    end
end