The 2018 GMC Terrain has a battery that can be found under the hood, inside the engine bay of Your vehicle. To locate it, first go to the front of Your vehicle, and using the prop arm found on the passenger side of the engine compartment, secure the hood in an open and upright position. Next, look around along the front of the engine bay, for a large, black colored battery with red and black shaded terminal connections. This is the battery for Your Terrain. If it needs to be replaced, You can expect to pay between $50 and $240 for parts alone.
Christine C
July 16, 2020
A battery is located under the hood of the 2018 gmc terrain, look for the large black box that has a red and black connector on the top.
Rory
November 17, 2022
Installing a trickle charger, the positive post has a thick red cable connecting???
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