NEHP

Update, dealer called me on Wednesday and said they have a new tank in and were able to install it that day. Installed it on the 21st in the afternoon and i picked it up in the evening before they closed. No issues yet. Took about a month to get the second version of the tank

Same issue with 2 different tanks on my 2021 Chevy 3.0. Original issue started March of 21. Brought it into the dealer and they said they'll order a new tank but unfortunately was a 3 month lead time. Luckily I never got speed limiting prompt, only the level on the display clearly wasn't reading correctly with how much fluid i had in the tank. Got the new tank replaced in the middle of June, 3 days later and with a full DEF tank i got a speed limiting message that would take effect in 140 miles or so. Brought it into the dealer and said I don't want it back until you fix this. They've had it since then and it's the middle of July. They have another tank on order (Rev 2 is what they call it, apparently GM redesigned the tank) but the part is on backorder so dont know when it'll get in. Chev dealer said they're seeing this in 3/4 tons a lot too, said they got one in the other day where the speed was reduced to 5 mph, could barely get it up the ramp to work on it. Chev dealer said they have they have no way to bypass the issue via software, guessing that's intentional to comply with gov regulations. I understand the concept and value behind this but imagine if this happened to you in the middle of winter somewhere in podunk BFE. SOL. All in the name of emissions. Calling the dealer about every 3 days to get the latest, luckily I was able to snag a Equinox loaner from them but that was like pulling teeth especially given the current inventory situation. Good luck all.