Owners manual will have that info. But I can save you some time of opening it 5000-7500 miles is what is recommended.
I would do the first one at 3000 just because it is breaking in- after that, you have an oil life monitor that will tell you- if you aren't putting on enough miles, change it every 6 mos. because you still get condensation inside the motor. your Terrain has a synthetic blend, oil, so you can go 6-10000 miles between changes- be sure to rotate the tires at each change then to get maximum life out of those too. I hope this helps.
My 2012 terrain usas about ONE quart to one quart and a half every thousand. The dealer tells me that is normal. After seven General Motors products I know they are wrong As a new driver in late 50s buying cars at $300. now that was a different story
Looking for a Used Terrain in your area?
CarGurus has 26,127 nationwide Terrain listings starting at $5,899.
Search GMC Terrain Questions
GMC Terrain Experts
Related Models For Sale
Used Cars For Sale