2015 Silverado 1500 High Country Crank, No start

[T Grissom]

Hey y'all, having issues with my 2015 Silverado. Towards the end of a 300+ mile road trip my truck's engine shut off while stopped at the turnoff of an exit. I restarted it drove to a gas station and then started it again to go home with no more issues. In the morning I had a hard start then drove to my job site and while I was waiting to go in parked in my parking spot the engine shut off again so I restarted it again. It ran about 5 minutes then shut off again. When i went to restart it my check engine light popped on, dash reads reduced engine power, and it will crank not start. I popped on my code reader and I am showing   three codes p1682, p0650, and p062b. I have 113k miles. Does anyone have any ideas????

[g2full]

First....

 

 

Welcome! Lots of good info on this site for you.

 

 

 

Not even sure I'm on the right track here...

But in what condition is your battery? I know depending where you live seasons are changing and all of those codes seem to point to voltage/power issues ( from the searching I did quickly ). I've been told and seen many forums on here about how wacky these trucks get when the battery gets low.

 

[T Grissom]

I just dropped a brand new battery in it a two days before this happened. I live in SC so the weather is pretty mild right now, low around 34-40 every night. I swapped it my ignition switch yesterday because they're cheap and at least I could rule that out. All my fuses are good and I swapped my fuel pump relay and had the same issues. Idk what to do now. It might actually be the fuel pump.

[g2full]

New batteries don't always mean they're good...I'd have that tested to be sure.

 

 

 

[g2full]

The first code you listed specifically talks about difference in voltage entering the ECM between the two main sources.

 

[T Grissom]

I'd lean more towards the battery but I hooked my jump box to it and had the same result.

[g2full]

A jump box isn't going to take the place of a properly functioning and charged battery.

 

[T Grissom]

2019-12-06_14-08-57.pdf

[T Grissom]

I just posted a pdf of my live diagnostics 

[T Grissom]

My fuel rail psi is reading 121.8

[B R A D]

Wife's CTS acted like that, the fuel pump was going out. I forget what pressure it was supposed to produce but it was way higher than I'd have ever thought... something like 2000+ psi

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[T Grissom]

New update, my ECM 30A micro fuse is blown and blows everytime I put a new one in. I'm pretty sure that means my fuel pump is burned up.

[Sierra Boy]

Did the fuel pump burn up do to running the tank down to low allot?

 

Sierra Boy

[T Grissom]

Not a lot but I can't say it's never been low.

[T Grissom]

My pump gets here tomorrow any advice from the folks who have swapped them before? I looked it up and doesn't seem too complicated.