how do I tow it behind my motorhome?

I have never heard of an automatic transmission that you can tow without damaging something. Honda had one that they said that you could tow but I never believed it. The best way to find out is check with the dealer.

I would strongly recommend NOT towing the Chevy the way you planned...Instead, ante up a little cash and do it the safe way and keep all 4 wheels elevated and off the ground with a tow dolly, like the one pictured here that U-Haul rents: http://www.uhaul.com/Reservations/EquipmentDetail.aspx?model=AT

neither budget ,penske, uhaul have dolly to tow HHR with. Just wanted to tow one across country & wound up driving it. Will mess up tie rods definitedly if towed, and radiator if loaded down the road with a puncture hole..

Have towed 2002 tracker 4x4 auto, 40,000 miles, no problem. Transfer case in neutral, transmission in park.

That's cause the transfer case is disconnected from your transmission when in neutral, but beware if your transfer case fluid level gets too low bad things happen real fast.

Not trying to debate the issue, just telling of my own experience.

Automatic transmission HHR is flat towable, read your owner manual

If it is towable it is at low speeds for short distances.