The 2010 GMC Terrain is equipped with a timing chain rather than a timing belt. Timing chains are generally more durable and require less frequent maintenance compared to timing belts. This means that, under normal conditions, the timing chain should last the life of the engine without needing replacement.
Timing Chain
Timing chain
It has a timing chain.
It has a timing chain.
Timing belt
chain
Chain
chain
It has a timing chain.
It must be a timing CHAIN ( the Gates website does not list a timing belt for the 3.5 )
3.8L has a timing chain. 4.0L has a timing belt.
The 2.0 has a timing belt.