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That's a long time. I could empty a complete tank in 2 to 3 oil changes easily on my previous diesel.

The weather will be better, that's for sure. :D

I would say just top it off...or even ask the dealer if they would drain and refill if it's a concern. Personally, a few months wouldn't bother me.

It definitely could. Here's a recent thread for more information around that: https://www.ecodieselram.com/forum/threads/running-a-tune-and-going-to-a-dealer.1276/

I agree with John here.

That 82 diesel is a bit different from these newer ones. Technology has come along way!

Welcome! Just follow the maintenance schedule and the rest will take care of itself.

Welcome to the forum @Bhoj24 !

Welcome! Glad to have you here @Ecopig2015 !

Welcome! How many miles on the new motor? What happen to the first one?

..and a preview! 🆒

Thanks for sharing ! @Ehume

It's not uncommon for a dealer to "update" (flash) the truck to the latest software. In my previous vehicles it was pretty common. It really depends on the dealer. You would need the proper tools to be able to tell if it was flashed or not.

What do you think? It's obviously a response to GM's Multi function tailgate.

Welcome! I know this video circles around a lot for this question:

Welcome! Nothing like having a truck, and the diesel part just puts the icing on the cake!

Sure, keep us updated on the fix. If someone else runs into the issue hopefully we can help them!

Try removing the negative battery cable for a bit. Otherwise, it might be a defective unit and/or need a software update. I remember someone having a similar problem and a software update resolved the issue for whatever reason. If you're under warranty take advantage of it. :)

It looks like we no longer have to send in the ecm for flashing as we can now do it via the OBD port under the dash per a post by Kory Willis.

It's a sore subject, but, before you get to down.. remember... most people join forums to say how bad something is, not to say the good things. :)