GMC Terrain: Fuel / Recommended Fuel (LYX - 1.5L L4 Turbo Engine, LTG - 2.0L L4 Turbo Engine)
LYX - 1.5L L4 Turbo Engine
Do not use any fuel labeled E85 or FlexFuel. Do not use gasoline with ethanol levels greater than 15% by volume.
Use regular unleaded gasoline meeting ASTM specification D4814 with a posted octane rating of 87 or higher. Do not use gasoline with a posted octane rating of less than 87, as this may cause engine knock and will lower fuel economy.
LTG - 2.0L L4 Turbo Engine
Do not use any fuel labeled E85 or FlexFuel. Do not use gasoline with ethanol levels greater than 15% by volume.
Premium unleaded gasoline meeting ASTM specification D4814 with a posted octane rating of 93 is highly recommended for best performance and fuel economy. Unleaded gasoline with an octane rated as low as 87 can be used.
Using unleaded gasoline rated below 93 octane, however, will lead to reduced acceleration and fuel economy. If knocking occurs, use a gasoline rated at 93 octane as soon as possible, otherwise, the engine could be damaged. If heavy knocking is heard when using gasoline with a 93 octane rating, the engine needs service.
Top Tier Fuel (Gasoline and Diesel)
Top Tier Fuel (Gasoline)
GM recommends the use of TOP
TIER Detergent Gasoline to keep
the engine clean, reduce engine
deposits, and maintain optimal
vehicle performance...
Prohibited Fuels (Gasoline)
Caution
Do not use fuels with any of the
following conditions; doing so
may damage the vehicle and void
its warranty:
For vehicles that are not
FlexFuel, fuel labeled
greater than 15% ethanol by
volume, such as mid-level
ethanol blends (16–50%
ethanol), E85, or FlexFuel...
Other information:
GMC Terrain 2018-2023 Owners Manual: Starting the Engine
Shift the vehicle into P (Park) or N (Neutral). To restart the engine when the vehicle is already moving, use N (Neutral) only. Caution Do not try to shift to P (Park) if the vehicle is moving. If you do, you could damage the transmission. Shift to P (Park) only when the vehicle is stopped...
GMC Terrain 2018-2023 Owners Manual: Headlamp High/Low-Beam Changer anf Flash-to-Pass
Headlamp High/Low-Beam Changer Push the turn signal lever away from you and release, to turn the high beams on. To return to low beams, push the lever again or pull it toward you and release. This indicator light turns on in the instrument cluster when the high-beam headlamps are on...
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Categories
Vehicle Personalization
The following are all possible vehicle personalization features. Depending on the vehicle, some may not be available.
For System, Apps, and Personal features and functions, see “Settings” in the infotainment manual.
To access the vehicle personalization menu:
Touch the Settings icon on the Home Page of the infotainment display. Touch Vehicle to display a list of available options. Touch to select the desired feature setting. Touch
or R to turn a
feature
off or on.
Touch 
to go to the top
level
of the Settings menu.
