now for off-road vehicles----tires cannot come out further than your fenders, Stinger bumpers are a hit and miss though-----we get inspected on Military post by civilian that specializes on German rules---also sound test as well on your exhaust, must have cats in, two front windows will not have any tint, and the list goes on....
TIRES-----The minimum legal tire tread depth for Germany is 1.6mm, although ADAC recommends 4mm for winter driving. Other countries have more stringent requirements – Austrian law mandates 4mm minimum tread depth for winter tires, and other European countries have distinct winter driving laws as well. MUST have MS(mud and snow) symbol---------
Haha I know know and we have much more no turn marker lights in red...
All I can say welcome in Germany my friend!
It will be interesting to see your Trailblazer with some german TÜV approved bumpers

I had some problems getting the waag center guard street legal with the winch on, but at least it could be done!
Hope to see some pictures with mods from you.
Karsten