One problem related to engine oil leaking has been reported for the 2018 GMC Terrain. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2018 GMC Terrain based on all problems reported for the 2018 Terrain.
My auto started leaking some kind of oil. Not sure what kind but I can see accumulation on driveway concrete pad. Had motor oil & filter changed in case it was a o-ring or not tight enough. It continues to leak.