Having a problem with the starter motor. on 2010 GMC Terrain

Once the car starts it sound like the starter gear is getting stuck in the ring gear making a noise and then retracting.
Is there an adjustment or does the starter need to be replaced.
Does not happen all the time.

Thank You in advance,

Mark2line

2 answers
Either you have low voltage to the starter, bad connection, or the starter is bad.
U don't say how many miles r on it. by your description it sounds like a starter motor.