Engine dies when hot, but may not have DTC

[PlazaEJ]

I work for a GMC dealership, and our guys aren't exactly sure what is the cause. Mine has thrown a trouble code. Something about the Crankshaft Position Sensor. But, it didn't throw the code every time. It's only died 3 times in a two week period. But, only after running for a while, and/or stopping for a short while, then starting again. Tomorrow we're going to replace the sensor. I'll let you know what happens.

BTW, I know my TB, and MAF are clean, fuel filter is only a year old, and fuel pump tests, up to *****.

Replaced the Crankshaft Position Sensor, today. I didn't get 2 miles from work, when it died, AGAIN. THIS SUCKS!!!

Temps in the 90's, today. I was driving with the A/C on, when it died.

Anyone else have any ideas?

Please.

EJ

 

[PlazaEJ]

Update:

They finally put in my fuel pump. (Like I had asked, from the start. But, the tech talked me out of it.)
Drove home tonight, and made a couple of stops, to deliberately let the motor heat soak a coupe of times. Engine ran fine. No stalls, no stumbles, no errors. Anxious to see how it does at weekend errand running. *fingers crossed*

EJ

 

[ccapehartusarmyINF.(ret)]

Fingers and toes crossed
if i were i betting man i would say the fuel pump was the culprit all these vehicles are notorious for there fuel pumps failing

 

[PlazaEJ]

Which is why I bought my pump 2 years ago, after I bought the truck.
At that time, a tech at the dealership told me, there was a TSB for the harness. So, we just replaced that, back then. 163K and my fuel pump finally gave out.

So glad that's over with.

EJ

 

[ccapehartusarmyINF.(ret)]

yeah mine started to shit the bed about 130k it would take two turns of the key to get it started it would almost never start on the first turn