Offroad Trailblazers and Envoys

Where have you driven your Trailblazer? has the information you need to modify your GMT360/70
for exploration and discovery of the unpaved areas in the world.

Check out our Articles below and join the forum!
how to get back into the dating scene again

View the latest news posts and updates from ORTB.

Vehicle suspension maintenance information and lifting articles.

Wheels / Tires

Relating to everything wheels and tires.

Differentials / Axles

Look in here for information about drivelines and gearing.


Components built by members, and tips for your own fabrication.

Electrical / Communication

Batteries, wires, antennas, and buttons.


Stuck? We've got info to help you get out safely.

Utilities & Resources

Calculators, technical documents, and general resources.


Want to spend some time outside? You'll find info about that right here.


This section helps you find and resolve common problems.

Latest Forum Posts

I also need new tires this information is very helpful. I will look at the suggested websites. I will try and get back to let you know [Go To Post]

Posted this in the Offroad section of the sister site as well...In preparation for swapping the factory 8" open rear out of the Trailblazer I [Go To Post]

what tires would you recommend for winter? It's almost time to change them, but I still can't decide which brand to choose..Statistics: Post [Go To Post]