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 […]