As I went to replace the O2 sensors, I found that one of the vehicle harness leads to the upstream sensor had been severed. I patched a new wire in, but will eventually want to replace the harness. Unfortunately, since the O2 sensor had been malfunctioning for thousands of miles at this point, it likely damaged the catalytic converters as well. I had Boulder Muffler do the work as I am between houses at the moment and all my tools are in storage. The whole process was fairly expensive, but the truck passed emissions with flying colors.
On Thursday some of the parts came in and I got to work installing them during my lunch break. I swapped out the air filter with a new factory washable filter and I repaired the exterior tailgate latch and trim. It turns out that a plastic clip had broken off and allowed the exterior handle actuator to fall into the door. New factory washable filter Old door lock repair Broken actuator clip All buttoned up with factory parts I also took this opportunity to transfer some of the equipment over from my old 88 Toyota Pickup. Sandtracks, Firestik antenna, Hi-lift Jack, and random decals I had floating around (including a unicorn decal for my daughter.