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!
Visit the Forums

View the latest news posts and updates from ORTB.

Lifts / Suspension

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

There's a couple members here with access to the VIN database. If you can provided the VIN for the vehicle it came from, they can check to see wh [Go To Post]

I suspect that is very possible. Sensitivity set too low, then yours will be one of those cars that goes off when a Harley rides by. Look around your [Go To Post]

I can attest to Cody being on at least one trip......... and having a muddy interior.Statistics: Posted by DirtyBacon04 — Fri Jan 18, 2019 11:21 pm [Go To Post]