GMC Terrain: Performance and Maintenance / Roadside Assistance Program

Diesel Exhaust Fluid

Diesel Exhaust Fluid (DEF) is used with diesel engines to reduce the amount of regulated emissions produced. The DEF system must be maintained for the vehicle to run properly...

Keys, Doors, and Windows

..

Other information:

GMC Terrain 2018-2025 Owners Manual: How to Add Coolant to the Coolant Surge Tank

Warning Steam and scalding liquids from a hot cooling system are under pressure. Turning the pressure cap, even a little, can cause them to come out at high speed and you could be burned. Never turn the cap when the cooling system, including the pressure cap, is hot. Wait for the cooling system and pressure cap to cool. Warning Plain water, or other liquids such as alcohol, can boil befo..

GMC Terrain 2018-2025 Owners Manual: Engine Overheating

The vehicle has an engine coolant temperature gauge on the instrument cluster and overheat messages in the Driver Information Center (DIC) to warn of engine overheating. See Engine Coolant Temperature Gauge. The decision may be made not to lift the hood when the engine coolant temperature gauge is in the overheat zone or an engine overheat DIC message displays, but instead to get servic..