I’m not sure where to even start with trouble shooting. I drove my truck out this morning, it sat for ~2 hours, when I went to leave, got a single click from the ignition.

My initial thought was it must be the starter. So I pulled the starter, it tested sat at autozone, but I went ahead and got a new (reman.) starter while I was there. Put the starter in and still got just a single click.

With the New starter in, I decided maybe the battery was doing something wonky (even though it’s new I.e. less than 3 months old). So I hooked it up to cables for a good while (15 minutes or so), and still got just a single click.

I was able to push start it to get it home, but pushing starting it every time I need to drive it isn’t an option.

I think any sort of neutral safety switch can be ruled out. If I turn the key without the clutch in, it does nothing. With the clutch in I get a single click of the starter pushing out. Also if I press the “clutch start cancel” button and turn the key I get a single click.

My starter is new as of today, battery is less than 3 months old, and alternator is ~1 year old. Also, when driving it home, I got no sort of indications anything was wrong with the alternator (a friend suggested it might be).

Thoughts? Ideas? Suggestions?

Start with battery terminals,,,clean cable ends and posts...tighten
Then check ground cable

Yeah, I’m a clown, I just thought of that myself. I haven’t done anything with the positive terminal lately (other than when the battery was replaced) but I had to put a new negative terminal on recently. Went and wiggled those around and it stared right up. Glad it was easy but man, I waisted a ton of time for something so silly.

Glad that was it.

I would put your OEM starter back in and return the reman. Aftermarket starters/alternators for these trucks are almost all universally junk.

I went through the exact same thing recently and it ended up the exact same way. Spent a week with the rig down and ended up with a new remanned Denso starter as well. Figured I rebuild the old one and then swap it back in and keep the remanned one as a spare (can do it in 30 minutes now). I've been contemplating doing a mega-thread of the steps for trouble-shooting this to hopefully save some others the headache.