Hey, your serial number is one off from mine with the same date code. Thanks for posting. Was thinking if it was counterfeit, would they bother with individualizing serial numbers? Wonder what the R number is? They're all slightly different. Maybe a resistance value? 0.2481 milli ohms? Wish I had a meter like professor Kelly:art number on the code: 3A0818180042/D081818/R0.2481
Professor Kelly is a member of the Forum, I would not be surprised to see a video related to this matter of the MSD failure, once my car hes the GM replacement I would be happy to sacrifice mine and sent it to him.Hey, your serial number is one off from mine with the same date code. Thanks for posting. Was thinking if it was counterfeit, would they bother with individualizing serial numbers? Wonder what the R number is? They're all slightly different. Maybe a resistance value? 0.2481 milli ohms? Wish I had a meter like professor Kelly:
Ditto. Also switched to grams on my scale and it was 143 g. An Eaton brochure had a size and weight comparison with other industrial fuses with their 300A version weighing in at 141 g.weights 5 ounces exactly
Thinking yours was R0.2482 where Freddy's was R0.2481 and mine is R0.2488. Yes, they're all slightly higher than your new fuse. Good catch. The higher the resistance, the more voltage drop, energy dissipation and higher heat. Could also be a threshold of the monitoring circuit where every thousandths of a milli-ohm matter. Reading a Cooper Busmann engineering fact sheet says these don't wear.The last part of my old fuse's part number was also R0.2481 and it's interesting if that is resistance in milli-ohms because the new one is R0.2429 which would indicate slightly lower resistance. I wonder if all those in the "bad batch" had a resistance of 0.2481 milli-ohms?
That update wasn't ready yet?!? So what have the other folks been getting when they complain of slow cold charging?Got mine replaced at the dealer today. Took about an hour or so. They also updated the software. I asked about an update to change the charging taper from a stepwise taper to a gradual decline curve, like the 2020 model. They said that that update wasn't ready yet but I should receive a notification when it's available. Of course, no charge for anything.
Yeah, I was wondering about that myself. I wasn't completely convinced that it was a "not ready" issue, but what was I going to do? I wasn't going to argue and it's not critical for me, so I'll just wait and see what happens.That update wasn't ready yet?!? So what have the other folks been getting when they complain of slow cold charging?
Thanks for the nice video and instructions. I wouldn't have thought that the 12v battery needed to be disconnected first, so thanks for the heads up, if I ever need to replace mine! Maybe I'll put a label on the MSD to that effect.
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.
That is so cool to find hidden compartments! I discovered the same thing in my previous (gas) car. Now I'm wondering what other features the Bolt has that aren't mentioned in the owner's manual?Also, there is a nice little cubby under the seat that you could wrap that old MSD in some foam or bubble wrap, and hopefully it will fit in there. Actually, it might not fit. I keep my wheel lock under there.