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!
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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

Ordered!! As always, thanks for putting these together!Statistics: Posted by HawkeyeC25 — Sun Dec 10, 2017 1:58 am [Go To Post]

Mine was deeper! I was touching the bottom of the brush guard lol.Statistics: Posted by Grimor — Sat Dec 09, 2017 11:34 pm [Go To Post]

Regulator1175 wrote:TBYODA wrote:NC_IslandRunner wrote:What the hell did you do Matt?Went balls deep in some high water without 4wd and Badlands, and [Go To Post]