2012 GMC Terrain Review
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Add-on Electrical Equipment
The OnStar system is integrated into the electrical architecture of the vehicle.
Do not add any electrical equipment. See Add-On Electrical Equipment on page 9‑64.
Added electrical equipment ...
Headlamp High/Low-Beam Changer
Headlamp High/Low-Beam Changer: Push the turn signal/lane change lever away from you to turn the high beams on.
Pull the lever toward you to return to low beams
This indicator light turns on in t ...
Recommended Fuel
Use regular unleaded gasoline with a posted octane rating of 87 or higher. If the octane rating is less than 87, an audible knocking noise, commonly referred to as spark knock, might be heard when dri ...





