kbm We have a Trailblazer with the 4.2 inline six cylinder. I'm really impressed with the engine and ride.
As a tow vehicle, it's very easy to select the neutral position on the 4 wheel
AWD system. The wiring for the taillights can easily be slide inside the frame rail and hooked up to the rear lights.
www.demco-products.com has base plates with online descriptions of the installation. I bought here before I knew about the good people below.
http://www.rvupgradestore.com/ (one of IRV2's sponsors -Thank you RV Upgrades)
has all the towing stuff you'll need including base plate
Probably more information than you wanted but maybe it helps someone else.