2014 Silverado--No start after minor exhaust work

[Lakegoat]

Try this... reload the same tune, then see if it will start

I did reload the tune that it was running on. Cranks, but no start.
Bought a new battery---same result.
Ordered two new O2 sensors---don't know how those would keep it from starting, but I was banging on the exhaust pipe close to the sensors in the collectors. I will get them tomorrow.
Cam sensor is counting
Thanks Ben

[Lakegoat]

WOW! All I can think of past that is the plugs are soaked or the rings got too clean (no oil after some gas) and lost compression. Weird.

We took it to the Chevy dealer to relearn the immobilizer. After he did the relearn, it still would not start. The tech said that it may be fuel fouled plugs. So, we figured, why not change them. That was the problem. Or it was both. The red light on the dash was flashing before and now it is not. Who knows. At least it is running. I have seen plugs a LOT worse than these, can't figure that one out.
Thanks

[10_SS]

We took it to the Chevy dealer to relearn the immobilizer. After he did the relearn, it still would not start. The tech said that it may be fuel fouled plugs. So, we figured, why not change them. That was the problem. Or it was both. The red light on the dash was flashing before and now it is not. Who knows. At least it is running. I have seen plugs a LOT worse than these, can't figure that one out.
Thanks

I had a Ford Escort that ran fine for years, started up fine this one day and went to work. Later that day I went to leave for the day, car wouldn't start, just crank. Pulled the plugs to check for spark and decided to close the gap just a little bit.. BAM... started right up ran fine for another years.

If it happens again, hold the pedal to the floor see if it will dry out and start.

[Jonblarc7]

Got ask did the RTV fix the exhaust leaks from the slip fit on the headers Y pipe. I'm getting read to put some speed engineering headers on my L86. And I don't won't to weld up the Y pipe yet.

[Lakegoat]

Got ask did the RTV fix the exhaust leaks from the slip fit on the headers Y pipe. I'm getting read to put some speed engineering headers on my L86. And I don't won't to weld up the Y pipe yet.

Yep!! They will be hard to take apart tho.