[rheavn]

I have used both Blue Ox & Roadmaster.  I have towed with the 10,000# all-Terrain tow bar for over 100,000 miles.  It performed perfectly.

I just changed tow vehicles & researched both companies for replacement.  I went with the Blue Ox 10,000# Aventa mainly because it is a much cleaner, modern look when towing.  I feel Roadmaster needs to update their setup.  

I would not consider an aluminum bar from either company.  jmho

I have not experienced any pinch points with either bar.

If after reading the installation instructions you are not sure if the bumper needs to be cut I would call each company's tech support and ask the question.  My experience is a small amount of trimming is normally needed, but I am not familiar with the Avalanche specifically.  Contacting customer support may also give you some insight into who has the best customer service.  I have not been totally pleased with Roadmaster tech support lately.

I have a Roadmaster 10,000# all-Terrain tow bar for sale for $150.00.  You pay shipping or I will deliver if traveling in your area or you pick up.  Tow bar has high mileage, but has been maintained perfectly.