GMC Terrain: Keys, Doors, and Windows / Doors

Safety Locks

The rear door safety locks prevent passengers from opening the rear doors from inside the vehicle. Manual Safety Locks If equipped, the safety lock is on the inside edge of the rear doors...

Liftgate

Warning Exhaust gases can enter the vehicle if it is driven with the liftgate or trunk/hatch open, or with any objects that pass through the seal between the body and the trunk/hatch or liftgate...

Other information:

GMC Terrain 2018-2025 Owners Manual: Windshield Wiper/Washer

The windshield wiper/washer lever is on the side of the steering column. With the ignition on or in ACC/ACCESSORY, move the windshield wiper lever to select the wiper speed. HI : Use for fast wipes. LO : Use for slow wipes. INT : Move the lever up to INT for intermittent wipes, then turn the band up for more frequent wipes or down for less frequent wipes...

GMC Terrain 2018-2025 Owners Manual: Raising the Seatback

Warning If either seatback is not locked, it could move forward in a sudden stop or crash. That could cause injury to the person sitting there. Always push and pull on the seatbacks to be sure they are locked. Warning A seat belt that is improperly routed, not properly attached, or twisted will not provide the protection needed in a crash...