Please use this thread to report the newest updates for the Blazer and give as much info. on it as is possible. Also include any side effects that you encounter as a result of these updates.
Newest software updates & OTA's for 2025
Chip
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I think this is really just dealers playing games so they can book those service hours for the reflash. I had a dealer hound me a couple years ago for an owner's manual supplement. They bugged me once or twice a week for MONTHS to come get this single owners manual page and book 0.2h of labor against warranty (billed back to GM, not me) for printing out a one-page supplement. You're exactly right, you would never know that it's anything other than a "recall" if that's what they told you.
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908 Posts
So my service advisor grabbed his code reader and plugged it into the OBD port. He said he can't charge GM for the work if thete arevno codes. Sure enough, both issues showed up even though my car shows no recalls in the database. I recommend folks ask for this check if your dealer doesn't automatically address both items.
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10 Posts
Just received the 2nd OTA update on a 2024 Blazer RS. One back in September 2024 now on April 2nd 2025.
Attachments
you are the first person Ive seen with the 249243 update. I did see that equinox evs got an update for supercruise. Do you have a 2025? What does the car say the new update does?
@Desmodromic noted above that it is the wiper park warming fix
There is a guy with a channel called average ev and he has had an equinox for almost a year. He just said it noted software improvements to improve ability to take curvy roads etc
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52 Posts
Came in yesterday, 2024 Blazer RS.
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Good to see GM is pushing updates OTA again on the Blazer.
I’m assuming the version my car is running on, with the heated and cooled seats grouped together, will have to wait for a dealer to do the other updates before I can get this OTA update. Has anyone on the same version as me (sqbr4-126.4) gotten the update pushed to them?
I’m assuming the version my car is running on, with the heated and cooled seats grouped together, will have to wait for a dealer to do the other updates before I can get this OTA update. Has anyone on the same version as me (sqbr4-126.4) gotten the update pushed to them?
Same version, have never seen an over the air. I still have one button for seat cooling/heaters.
i dont think there is anything out there that backs up the belief that the update from the dealer was needed to get OTAs.
Also got my OTA on April 2nd. Installed smoothly, no apparent issues after installed so far. Haven't really noticed any changes yet, but only driven couple times.
Looking at my 2024. Last update (and only) 11/2/24. GM N24-247054A
Reminded me of this bit from a Jacques Brel song
Car me voyant sans exigence
Because seeing me without demands
Elle me croyait sans besoin
She thought I had no needs
So because we do not ask about it they think we don't need to know !
To follow up on my last post, just got an update pushed to me so you do not need to have the most recent dealer installed updates to get this.
My car is in the same state as your ...I have the heated and cooling grouped together...os version of Jul 2023 and with the october update....so i guess this update might appear soon then
After installing GM N25-F172AE I’m now getting an Onstar needs attention warning on the app and the red Onstar light in my car. I’m going to drive it around this weekend and see if it clears like my high voltage ones did a while ago. If not, back to the dealership…
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