Sorry for the late response, but I got my truck back 4 days after leaving it with the dealership. Everything is working fine now.
The guy at the shop mentioned something about having to sync mileage to the newly installed unit ... so maybe not so plug and play.
The shop said it was the third...
Oh right ... The speedo randomly/intermittently didn't work. The tech at the dealership said they're seeing more and more of these issues. The tech said it might be due to poor soldering in the unit. Another tech said it was the CPU failing to translate the analog sensor to digital. I'll update...
Just wondering if anyone else has had their speedometer replaced. I dropped my 2018 TRD Off-Road off at the dealer today. They said it can take 5-30 days to fix.