I have always thought of the Hummer H2's as a pretty cool ride with a sort of apocolyptic feel to it but when I was looking through some of the statistical information, I noticed that they also had a pretty decent towing capacity attached to them. I started looking through the towing information and posted my findings in this post. Enjoy!
Overview of the Data For the Hummer H2's:
Engine Choices: There were not many engine choices for the H2's between '03 and '09, two in fact: the 6.2L engine and the 6000 V8 engine. The engine equipped made a huge difference in the towing capacities when you compare the two, having a difference of 1,600-1,700 pounds!
The 6.2L engine was used for the '08 and '09 model years and had the higher 8,200 pound rating. The '03-'07 model years used the 6000 V8 engine that had the lower 6,600-,6700 pound capacity.
Towing Capacity: The towing capacity numbers for the Hummer H2's stayed the same for most of it's life ('03-'07) hovering at around 6,600-6,700 pounds and then in 2008 and 2009, it had an increase in capacity to 8,200 pounds, due to the new 6.2L engines that were used instead.
Some towing specs for the H2's were identical so I only listed the one towing chart for more than one model year.
Be sure to read through the owner's manual for your H2 to make sure you have all of the towing related information you need. There are other important elements regarding break in period, air ride system info and other topics that you need to know about.
2008 & 2009 Models:
The 2008 and 2009 Hummer H2's both came with a 6.2L engine and had a maximum towing capacity of 8,200 pounds, according to the owner's manuals, which was the highest ratings for all H2 model years.
The GCWR for these H2's was around 15,000 pounds and the gear ratio was 3.73 for all models, according to the chart below.
Looking at the chart, you can see that there were two different models of H2 Hummers available and these were the SUT and SUV models but both had the same towing specs.
2006 & 2007 Models:
The 2006 and 2007 Hummer H2's had a significantly lower maximum towing capacity than the 2008 and 2009 models, differing by 1,600-1,700 pounds.
The 2006 and 2007 H2's maximum stated towing capacity was 6,600 pounds or 6,700 pounds, depending on the model you had (SUV or SUT).
I am not sure why the SUT had a 100 pound lower capacity than the SUV model, as shown in the chart below but it didn't make a huge difference in the numbers as both models seemed to use the same engine and axle ratios and even had the same GCWR.
The 2003-2005 Hummer H2's had only one towing figure in the chart and that was a maximum 6,700 pound towing weight rating.
All three model years ('03-'05) used the same engine, the 6000 V8, and everything else was nearly identical with the exception of the '03 models having a 500 pound less GCWR compared to the '04 and '05 model years.
The 6000 V8 engine that was used for the '03-'05 model years was the same engine used for the '06 and '07 models but there was not any signifying data that showed a difference in towing capacity between the SUV and SUT models like we saw in the '06-'07 towing charts.
SUV And SUT Models:
In a couple of the towing charts for the H2's, there was reference to SUV and SUT models that some people may not be familiar with and I thought I would briefly explain what the differences are in appearance alone, not all of the specifics...
The H2 SUV model is designed to look like an SUV with a fully enclosed cab area for passengers and cargo.
The H2 SUT models have the four doors like the SUV model but an open "truck bed area" in the rear.
Resources For The Hummer H2's:
For the H2 Hummers, I used the owner's manuals to gather all of the data as far as towing information goes and is where I found the towing charts as well. There is other helpful towing related info I found in the H2's manuals that I suggest everyone read to get a better idea of all of the towing specs that GM recommends.