Can I tow a 20 foot glass tandem trailer a long way 400plus mile

I do not see a problem with towing with a Trailblazer. I have an 05 model that I use to pull my 19 ft Javelin with and you can hardly tell that the boat is there. I do however have brakes on my trailor which I feel helps due to the shorter wheel base of the Trailblazer. Owners manual calls for anything over 1500 lbs to have it's on braking system. I will tow from elevations that are 3600 feet above sea level down to 600 -900 feet elevations on 6-9% grades and have no problems so far. On return trips the T/B will have to down shift into second to make it to the top of the grade. The Trailblazer has 265Hp where my 97 Dodge Ram with a 360 only has 240Hp. The inline motor will also produce more torque than a v motor. Torque is what is needed when taking off and climbing hills while towing. I have 3 directions that I can go out of the mountains and get to a lake. The closest is only 60 miles and the other two are 85-100+. I have yet to have any problems.

You can tow with a VolksWagaon beetle if you do it in a smart manner.   Add an external, auxillary trans cooler, don't tow in overdrive, and tow at a reasonable speed, and don't try to force the issue when going up or down hill.  Start trying to run 70 - 75 mph, especially in OD, you're transmission will suffer at least a half life.

The Trailblazer already has the trans cooler on it. They all come stock with the "towing package" from the factory. The only thing you need to add will be ball and reciever tube and pin. As far as towing in O/D if you read in the owners manual the newer trans in the Trailblazers are being designed to be able to tow in O/D. The only requirement is if the transmission begins to shift back and forth between D and O/D frequently then you need to use drive.

I have an '04 Trailblazer extended and own a 17' Stratos - fairly heavy boat.

You don't know the thing is on the back.  My buddy says it hauls better than his '02 Explorer.

DID have to put 4 new brake pads on the vehicle this week after just 35, 000 miles but believe that

has ONLY to do with how my wife drives, nothing with hauling the boat up and down the map.

Ernels post is accurate with my assessment.