Truck stall intermittently

It's hard to say what your problem is as there are several issues here. Was the PCM properly flashed by the dealership when it was installed? If the PCM is bugging out you could have a problem like you are describing, as the digital reading for the odometer is stored in the PCM, not in the cluster itself. Theoretically oil pressure could be an issue but it sounds like the PCM is acting up.

The flashing the PCM improperly may be something to go back to. But the original PCM was partially fried, considered comprimised. So we saw fit to replace it. Hoping for good results. My other question is and would have been, two other things. Fuses. Could they need to be replaced? Those tied in to these/this trouble areas. And my battery connector cables are pretty worn and old and to the eye...may need replacing. Could a faulty connector cable short and cause the engine kill and theft light? Thank again for your reply. I have been seeking answers and assitance going on a year.

I know this was posted a few years ago. But I was wondering if you ever figured out what was wrong with your Navigator? I have a 2010 that is doing the exact same thing. I have replaced the onboard computer. Got new keys, had it flashed, replaced the dash cluster, replaced the upper and lower ignition switch and a few other things. Nothing has worked.