The gas tank on the 2010 GMC Terrain holds 18.0 gal..
16.0 Gallons
25 gallons
11.9 gallons
The gas tank on the 2013 GMC Terrain holds 18.0 gal..
The gas tank on the 2014 GMC Terrain holds 18.0 gal..
The gas tank on the 2012 GMC Terrain holds 18.0 gal..
The gas tank on the 2011 GMC Terrain holds 18.0 gal..
16 gallons , according to the Owner Guide
( 16 ) U.S. gallons
17.5 gallons , according to the Owner Guide
( 13 gallons ) according to the Owner Guide
Maximum capacity is 15.3 gallons.