[Satar]

2024 Silverado 2500HD - Picked up on Saturday, 4 days and 401 miles later the CEL comes on with P0402. If the dealer has the update sure would have been nice to update mine before sending me out with it.

1st post and 1st Duramax. Look forward to spending more time on this forum.

Welcome to the forum and congrats on the truck even though this hiccup sucks.

Hopefully they will get the update pushed and repaired to you pretty quickly.

 

[dungqmai]

2024 gmc 2500 duramax engine light came on at 200 miles, turned off, and back on at 400 miles dealer update for code: - P0402 exhausts gas recirculating valve flow excessive - U0146. Lost communication w/ central gateway module Next morning traction control light came on and to service: - traction control & ESC Just called dealer to look at it again and cannot provide me with a loaner. Bs. Want my money back

 

[dungqmai]

2024 gmc 2500 duramax engine light came on at 200 miles, turned off, and back on at 400 miles dealer update for code: - P0402 exhausts gas recirculating valve flow excessive - U0146. Lost communication w/ central gateway module Next morning traction control light came on and to service: - traction control & ESC Just called dealer to look at it again and cannot provide me with a loaner. Bs. Want my money back

Vehicle is now jerky when braking to stop.

 

[Satar]

Vehicle is now jerky when braking to stop.

Welcome to the forum. No loaner, Sounds like a dealer issue there. You have an appointment to get it back in to resolve the U0146.

 

[cutty636]

2024 Silverado 2500HD - Picked up on Saturday, 4 days and 401 miles later the CEL comes on with P0402. If the dealer has the update sure would have been nice to update mine before sending me out with it.

1st post and 1st Duramax. Look forward to spending more time on this forum.

here is the update. I just got the “over the air update” yesterday

 

[cutty636]

I installed the update yesterday around 1pm and the P402 hasn’t come back yet… hopefully it won’t. But I’ve been dealing with it for the past 3 weeks, just clear code with idash and it comes back the next day, so technically it should have come back on by now but it hasn’t yet.

 

[Dinkel]

Update on this I looked at my update history and this update was installed on June 2nd prior to me purchasing the truck. Even after the update the CEL came on this morning with 401 miles. Doesn't seem like the update helped in my case.

 

[dungqmai]

Welcome to the forum. No loaner, Sounds like a dealer issue there. You have an appointment to get it back in to resolve the U0146.

Had both code updated the same day. 🤦🏻

 

[jcalzadillas]

What's up guys I just got a 2024 duramax end of April same deal 500 miles check engine on took to dealer gave me a loaner and they "fixed" the problem light just came back up same deal emissions system I only have 4087 miles on it I do not want to take to dealership and get a chevy equinox loaner lol any suggestions thanks

 

[dungqmai]

Three weeks in I only have 700 miles And it has been in and out of the dealer four times

 

[Shalard10]

My 2024 started saying “Service Emissions Immediately. Max Speed limit to 65” then to 55. I was in the middle of the desert hauling my RV and my family for a vacation. Took it to a dealer and they've been trying to figure out what the real problem is for 4 days. The mechanics at chevy couldn't get the parts. GM isn’t responding to the technicians requests. And GM refuses to talk to me about fixing then issues because I contacted a lawyer. The dealership got a call from GM finally and they want to look for an identical vehicle to trade. But they all have this same issue. And the update didnt fix anything.

 

[shannonlab]

I may be dead wrong, but I'm beginning to sense that we're not getting the full picture as to the depth and complexity of problems in the 2024s. Hope I'm wrong.

Cheers,

 

[dungqmai]

My 2024 started saying “Service Emissions Immediately. Max Speed limit to 65” then to 55. I was in the middle of the desert hauling my RV and my family for a vacation. Took it to a dealer and they've been trying to figure out what the real problem is for 4 days. The mechanics at chevy couldn't get the parts. GM isn’t responding to the technicians requests. And GM refuses to talk to me about fixing then issues because I contacted a lawyer. The dealership got a call from GM finally and they want to look for an identical vehicle to trade. But they all have this same issue. And the update didnt fix anything.

I am suppose to pull my camper next week and glad all of the problem arises at home than on the road. Good luck

 

[Alloutdrs1]

I may be dead wrong, but I'm beginning to sense that we're not getting the full picture as to the depth and complexity of problems in the 2024s. Hope I'm wrong.

Cheers,

Yeah reading these posts it's apparent they were not ready to push these trucks or but did anyways. Gm switched to the global b architecture for the 24's and it's probably gonna have issues until 25' or so when they get it all figured out I'm guessing. Sucks for all the guys that bought a 24' and have to deal with this crap, these trucks are not cheap.

 

[Privman]

This happened to me, I think it was a result of not letting the truck do a regen ( I was doing some testing with the banks ram air intake which only supports up to 2023. So the regen got delayed, maybe a few too many times).

I have the banks idash and watch the soot percentage and the truck will go into active regen between 100-105% (I’m assuming that 100% isn’t actually 100% soot level, rather it relates to 100% of whatever value gm has set as regen activation level, something like a safety factor to leave some amount of accumulation available because if your actually 100% plugged up then your engine won’t run.) However, certain conditions must be met for the truck to go active regen beyond just 100% level, such as the vehicle must be driving at certain rpm levels and temperatures must be hot enough, and my testing didn’t allow for this so I got the same engine message as you but I had 174 miles till max speed.

The truck was running like 💩 so I put the factory intake back on and got on the Highway to allow for regen conditions and once the regen completed I cleared all the codes and everything was good… except still daily getting P402 code but that was before all the other emissions codes anyway.

*As a side note, the idash is NOT 100%functional with the 2024s yet but does allow for a decent amount of monitoring. The forced mobile and stationary regen options do not work and you also can’t display your transmission gear or oil pressure which worked on my 2020. I’m sure there are many options that will be fixed once they have a firmware update.

Well I didn't tell the whole truth. lol I did experiment with the banks exhaust for 2023. DONT DO IT. lol I had to end up sending it back to wait for them to fix issue with 2024. Even after putting my OEM exhaust back on I still had my message for 2 weeks. Once cleared everything has been fine. I do have Banks Intercooler pipes, WC Fab Silencer Delete & their turbo horn pipe installed. No issues so far. I'd like to get the idash next and an intake. I wish Banks would hurry up and fix the issues.

 

[cutty636]

Well I didn't tell the whole truth. lol I did experiment with the banks exhaust for 2023. DONT DO IT. lol I had to end up sending it back to wait for them to fix issue with 2024. Even after putting my OEM exhaust back on I still had my message for 2 weeks. Once cleared everything has been fine. I do have Banks Intercooler pipes, WC Fab Silencer Delete & their turbo horn pipe installed. No issues so far. I'd like to get the idash next and an intake. I wish Banks would hurry up and fix the issues.

So everything is good with the wc fab intake horn and banks boost tubes, that’s good to know. I plan on getting them because I figured surely they wouldn’t cause any issues. I’m surprised that the exhaust caused issues, that means that the banks exhaust is really flowing quite a bit more and the post dpf sensor is reading a substantial pressure difference.

I knew the intake would cause issues without having the maf dongle, but I was hoping it would run normally and I could just clear the cel daily, yea don’t do it. I plan on getting the fass fuel filter kit and vse ccv upgrade kit, there’s a guy on YouTube that put the fass kit on and the truck ran fine afterwards but I’ve not seen anyone with the vse ccv kit to confirm if it causes issues.

 

[Privman]

So everything is good with the wc fab intake horn and banks boost tubes, that’s good to know. I plan on getting them because I figured surely they wouldn’t cause any issues. I’m surprised that the exhaust caused issues, that means that the banks exhaust is really flowing quite a bit more and the post dpf sensor is reading a substantial pressure difference.

I knew the intake would cause issues without having the maf dongle, but I was hoping it would run normally and I could just clear the cel daily, yea don’t do it. I plan on getting the fass fuel filter kit and vse ccv upgrade kit, there’s a guy on YouTube that put the fass kit on and the truck ran fine afterwards but I’ve not seen anyone with the vse ccv kit to confirm if it causes issues.

Yeah, everything is fine so far. Big change in turbo noise. Not really sure if it did much performance wise. Cold side pipe was very easy to install. Don't remove wheel or liner, its accessible from top. I will update on hot side later this evening when I do it but going to try from topside first. Intake horn was rough getting out. The right side bolt is pretty hidden. Once you get it out, its much easier to install because you change out the bolts for stud/nut combo.

I ordered exhaust knowing slight risk but once I had it installed and called banks about the engine light, to see if they had tried it they told me they had and they hadn't had a fix for it as of 2 weeks ago (that's why they haven't released it for 2024 yet). I was going to hold off on sending it back until after this update came to see if that would have fixed it but I've been in contact with my two local dealers and they had no knowledge of getting one so I just sent it back and will wait it out. The three days it was installed I could tell the truck reacted better to it though for sure. No noise change though. Keep us updated on idash, maybe they'll come out with an update or something soon for it.

 

[cutty636]

Yeah, everything is fine so far. Big change in turbo noise. Not really sure if it did much performance wise. Cold side pipe was very easy to install. Don't remove wheel or liner, its accessible from top. I will update on hot side later this evening when I do it but going to try from topside first. Intake horn was rough getting out. The right side bolt is pretty hidden. Once you get it out, its much easier to install because you change out the bolts for stud/nut combo.

I ordered exhaust knowing slight risk but once I had it installed and called banks about the engine light, to see if they had tried it they told me they had and they hadn't had a fix for it as of 2 weeks ago (that's why they haven't released it for 2024 yet). I was going to hold off on sending it back until after this update came to see if that would have fixed it but I've been in contact with my two local dealers and they had no knowledge of getting one so I just sent it back and will wait it out. The three days it was installed I could tell the truck reacted better to it though for sure. No noise change though. Keep us updated on idash, maybe they'll come out with an update or something soon for it.

I talked to a Banks tech about the idash and he confirmed that it wasn’t 100% compatible but the user would be able to update the software once their engineers produced an update. He said that there wouldn’t be any announcement of the update so you just have to keep going back to the software update website to see when they push one. He also told me that he didn’t think they would be able to push an update for the derringer so it’s likely the user will have to buy a new one.

im considering getting the pedal monster too, the dead pedal/throttle lag is terrible.

 

[minthral]

Wow this is a discouraging read. I picked up a 24 chevy 2500 LTZ diesel last week. I don't see any software updates pending nor do I have any check engine lights... truck only has like 200 miles on it. Is the update only done through dealer or it would be available in the infotainment system? I really doubt dealer did any updates prior to giving me the keys.

 

[JugDish]

Mine was done over the air. I do know when I picked mine up 6/2, the dealer said they checked for any updates prior to handing me the keys.