GMC Terrain: Cooling System / Engine Coolant

GMC Terrain 2018-2026 Owners Manual / Vehicle Care / Vehicle Checks / Cooling System / Engine Coolant

The engine cooling system in the vehicle is filled with DEX-COOL engine coolant mixture. This coolant needs to be checked and changed at appropriate levels. See Recommended Fluids and Lubricants and Maintenance Schedule.

The following explains the cooling system and how to check and add coolant when it is low. If there is a problem with engine overheating, see Engine Overheating.

Cooling System

1.5L Gas Engine Engine Cooling Fan (Out of View) Engine Coolant Surge Tank and Pressure Cap 1.6L Diesel Engine Engine Cooling Fan (Out of View) Engine Coolant Surge Tank and Pressure Cap 2...

What to Use

Warning Plain water, or other liquids such as alcohol, can boil before the proper coolant mixture will. With plain water or the wrong mixture, the engine could get too hot but there would not be an overheat warning...

Other information:

GMC Terrain 2018-2026 Owners Manual: Passenger Sensing System

The vehicle has a passenger sensing system for the front outboard passenger position. The passenger airbag status indicator will light on the overhead console when the vehicle is started. The words ON and OFF will be visible during the system check...

GMC Terrain 2018-2026 Owners Manual: Rear Cross Traffic Alert (RCTA)