I've removed idle control valves from other vehicles before but I'm not sure about the 4.8l. I've seen the videos for the 5.3ls but there isn't really any info on the icv on the internet. Actually there isn't much about the 4.8 at all. The icv In the picture I attached it looks like the throttle sensor and the icv are in one piece? I would say it's a 1mm torx bit and about 6 bolts to remove it. I've read one the only site I seen anything about it said it wasn't separately serviceable. Whatever that means.

 

idle air control valves have gone with the times in most cases, what year?

 

It is a 2005. The motor shivers when idling in park. If there is no icv what could it be?

 

electronic throttle control did away with the IAC, is it misfiring or just idling a little rough? Could be a throttle body issue or vacuum leak. Do you have access to a scantool?