2006 GMC Envoy Q&A

2006 GMC Envoy Question: Why does my Rpm needle move up and down when starting sometimes?

Almost everytime I start my car the Rpm needle moves up and down quickly and it sounds like I am giving it gas when I am not. What would cause this. -
Answer 1
poss throttle body issues do youhave a ck eng light on? if so scan codes and post so we can adv -
Comment 1
No the check engine light isn't on. -
Comment 2
THAT DOESN'T MEAN ANYTHING HAVE THE LIVE DATA READ -