My 2010 Chevy Traverse has trouble shifting out of first.

What is your question?

When I first start the car after it has been parked for more than a few hours or overnight and I start driving, my car has trouble shifting out of first. Sometimes it will go in 2nd the slip back into 1st and the engine rpm's will be at 3000 to 4000. When it does this, I come to a stop and start going again and the problem is resolved. It shifts fine after about 5 minutes. I would apprecieate any help or suggestions. also, My check engine light is on and I got an P0008 error code from AutoZone

What makes this problem better or worse?

gets better after about 5-10 minutes of driving

How long has your 2010 Chevrolet Traverse had this problem?

a few months