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Trailblazers and Envoys Offroad

How To Guides

Various how-to articles, amassed from the knowledge of our community.

Trailer Brake Controller Install

Trailer Brake Controller Install

How to install a brake controller in a Trailblazer, Envoy, or other GMT360. Time: 0.5 – 1.5 hours (Depending on whether you solder or use butt connectors) Tools: 9/32” or 7mm Socket/Ratchet or Nut  Driver ¼” Socket and ¼” Drive Ratchet Wire Strippers Soldering Iron Solder Heat Shrink (medium and small sizes) Electrical Tape Dremel […]

Front Wheel Bearing Replacement

Front Wheel Bearing Replacement

This article covers how to diagnose and replace a front wheel bearing on a TrailBlazer (or Envoy). Wheel bearings are a complex and fairly expensive item for a TrailBlazer.  They serve to support the vertical weight of the vehicle, transfer lateral turning forces from the wheel to the body, transfer the power from the front […]

Rear Axle Wheel Bearing Replacement

I recently had a vibration problem in my 03 LS that didn’t go away after I replaced u-joints, balanced the tires, and checked the front wheel uni-bearing hubs (which were previously replaced). I also noticed a squeak and at times a rumble that seemed to be coming from the general direction of the rear axle […]

Tie Rod Replacement (Inner and Outer)

Tie Rod Replacement (Inner and Outer)

Tie rods connect the rack and pinion to the steering knuckles.  They essentially transfer the lateral motion of the steering ram to the tires.  They go through a lot of abuse, especially off road.  Every bump, steering input, and braking motion put stress on the components. Tie rods are generally made up of two components.  […]

Suspension Lift Installation Instructions

Suspension Lift Installation Instructions

This article is brought to you by BDS Suspensions. Front Installation 1.Park the vehicle and a clean, flat surface and block the rear wheels for safety. 2. Raise the front of the vehicle and support the frame with jack stands behind the lower control arms. 3. Remove the front wheels. 4. Disconnect the sway bar […]

Rear Axle G80 Differential Rebuild

Rear Axle G80 Differential Rebuild

My G80 quit some time ago. I don’t know about you, but I like both of my rear wheels to lock up when I need them, so a rebuild was in order. Most other platforms simply ditch their G80’s in favor of something stronger. Unfortunately, us 8.0″ rear end Trailvoy’s don’t have that option. In […]