GMC Terrain: Conversions and Add-Ons

Add-On Electrical Equipment

Notice: Do not add anything electrical to the vehicle unless you check with your dealer first. Some electrical equipment can damage the vehicle and the damage would not be covered by the vehicle's warranty. Some add-on electrical equipment can keep other components from working as they should. Add-on equipment can drain the vehicle's 12&-volt battery, even if the vehicle is not operating.

The vehicle has an airbag system. Before attempting to add anything electrical to the vehicle, see Servicing the Airbag-Equipped Vehicle on page 3‑32 and Adding Equipment to the Airbag-Equipped Vehicle on page 3‑33.

See also:


Wiper and washer switch
Windscreen wipers The windscreen wipers can be operated with the ignition switch in the “ON” or “ACC” position. If the blades are frozen to the windscreen or rear window, do not operate the wipers until the ice has melted and the blades ...

Remote keyless entry system (if so equipped)
It is possible to lock/unlock all doors (including the lift gate), and activate the panic alarm by using the keyfob from outside the vehicle. Before locking the doors, make sure the key is not left in the vehicle. The keyfob can operate at a ...