I have a question if someone knows why my Hummer H2 has a high idle when I started the car sometime . you can hear the radiator fan is very clear and when pulling away, you have to have some higher revs for it to change .sometimes i start the car and I can not hear the radiator fan
. can that be a poorly charged battery .

regards sweden

 

I would suspect your used to electric fans, the H2 has a belt driven fan, check and make sure the belt it tight.

But the radiator fan will always be turning as long as the engine is on.

Dunno if that answers anything you wanted to know...