After about a 2 week wait for the backordered part, I got my MSD and replaced it today. I just wanted to replace it to give me some peace of mind after seeing a few people who got stranded due to a bad MSD. For my 2019 built in March 2019, it already had the new part number (24294004) even though the date stamped on the part itself was Jan 5, 2019. I assume GM assigns a new part number if a batch is found to be bad and the TSB calls for replacing with a new part number so I likely did this for nothing. In any case, I'll have a spare at least and found that it was pretty easy to do so maybe this will help someone else. I know some people (even those with 2019 Bolts) have an older/different part number but mine ended up being the same. Interesting that the bar codes on the actual fuses are different though.