I undertook a GMT800 project...

[swathdiver]

You're not wrong about that thread of the mysterious gas cap and changeover. Also, that rubber boot on the front drive shaft came apart and that is what took out all those wires.

 

[iamdub]

did you check the wheel hubs? i'm guessing those may be questionable based on the condition of said project.

I did. RH side had been replaced as indicated by blue sensor wire and was tight. LH side wasn't as new and had likely been replaced given the mileage, but was tight as well. Ball joints and tie rods were tight but most boots were split. I'm sure they weren't original but the bushings and shocks were definitely aged.