Same thing happened to us.. same van.. 2018. We never drove it once the over heat light came on.. but still the dealer had to replace a bunch of stuff totaling $5000 … and they do not know what caused it. We just got it back today.. it smells like burning coolant already.. they claimed we drove it over heated.. we never did.. when the light came on.. we pulled over , put coolant in it.. and it was fine.. but still, they claim the engine was done.. Anybody else know what’s going on with this particular year of Pacifica??