I am interested in all I can learn from other Hummer owners. I believe that we all have some of the same problems and should be able to help each other. I am currently having a problem with my 06 H3. It is dropping RPM at idle but has not thrown a check engine code so I am having trouble diagnosing the problem. Has anyone had this happen on theirs?

2006 H3 Adventure

 

Welcome to the forum, i would suggest looking in the H3 section... Be a little more specific, when you say idle, just while it's sitting in a driveway, or do you mean at a light?

 

Welcome. This might not help but my H2 has a problem when I try to idle while driving through sand washes, it just keeps wanting to go faster and faster. LOL that would be how it got airborn. OOPS. sorry that doesn't really help. I'm sure the H3 guys can help you out though.