One problem related to electrical failure has been reported for the 2010 GMC Terrain. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2010 GMC Terrain based on all problems reported for the 2010 Terrain.
I started receiving a warning to service passenger air bag whenever my oldest son sat in passenger seat. It did not occur whenever anyone else sat in the seat so I did not immediately act upon warning light/buzzer. Recently I had a problem with the air conditioning compressor, so when brought to the dealer, they found a bad electrical sensor connector under the passenger seat that was only activated when my son's weight was in the seat. A heavier person closed the connector circuit, a lighter person was not registering in the seat. If an accident had occurred, a passenger air bag malfunction could have occurred with serious consequences.