[deserth3]

My kids are grown so my knowledge of car seats is also limited.
There's a large section in the owners manual about child car seats. Most service departments have someone trained in car seats. At least That's what I understood from Jerry Seiner Hummer in Utah.
Your local poloce department or highway patrol will be able to help you too.
From what I got from the presentation I got the H3 has the metal rings and it's recomended using them instead of the seatbelt.