GMC Terrain: Initial Drive Information / Passenger Sensing System

Head Restraint Adjustment and Seat Belts

Head Restraint Adjustment Do not drive until the head restraints for all occupants are installed and adjusted properly. To achieve a comfortable seating position, change the seatback recline angle as little as necessary while keeping the seat and the head restraint height in the proper position...

Mirror Adjustment

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Other information:

GMC Terrain 2018-2025 Owners Manual: Weather Conditions Affecting ACC

If the interior temperature is extremely high, the instrument cluster may indicate that ACC is temporarily unavailable. This can be caused by extreme hot weather conditions with direct sunlight on the front camera. ACC will return to normal operation once the cabin temperature is lower. Conditions that are associated with low visibility, such as fog, rain, snow, or road spray, may limit ..

GMC Terrain 2018-2025 Owners Manual: Water in Fuel (Diesel)

Improper fuel tank inspection or cleaning, or contaminated fuel from suppliers, can cause water to be pumped into the fuel tank along with the diesel fuel. If a WATER IN FUEL - CONTACT SERVICE message displays, the water must be drained immediately. Warning Diesel fuel containing water is still combustible. You or others could be burned. If the fuel needs to be drained, keep sparks, flam..