Does a 2024 Duramax have fewer emissions issues?

Rabbittown · January 31

GM has approved the repurchase of my 2024 L8T custom. So, I'm looking for my next truck.

I've decided to move to the Duramax because of cross-country towing. I know the 2024 Duramax has been upgraded and is theoretically supposed to be more efficient and produce less emissions. So, theoretically, there should be fewer emission efforts.

I'd kind of like more options than my Custom, but that's all that's in my budget for a new one. I can purchase a low-mileage High Country for the same price. I'm trying to decide if the new engine makes it worth it. Anyone with insight?

Rabbittown · January 31

11 hours ago, Rabbittown said:

GM has approved the repurchase of my 2024 L8T custom. So, I'm looking for my next truck.

I've decided to move to the Duramax because of cross-country towing. I know the 2024 Duramax has been upgraded and is theoretically supposed to be more efficient and produce less emissions. So, theoretically, there should be fewer emission efforts.

I'd kind of like more options than my Custom, but that's all that's in my budget for a new one. I can purchase a low-mileage High Country for the same price. I'm trying to decide if the new engine makes it worth it. Anyone with insight?

I could’ve worded it better. It’s not so much that the new ones are supposed to produce fewer emissions, but that they’re supposed to burn the soot at a higher temp to prevent egr clogging.

Jettech1 · February 5

It's funny you asked this because I was wondering the same thing. In a few years we are looking at moving up to fairly large 5th wheel to full time in after I retire and would probably need the diesel. BUT....I'm not touching them until these DEF and particulate issues are well behind us all. Also the fuel pump issues as well.

waltman · February 5

2 hours ago, Jettech1 said:

It's funny you asked this because I was wondering the same thing. In a few years we are looking at moving up to fairly large 5th wheel to full time in after I retire and would probably need the diesel. BUT....I'm not touching them until these DEF and particulate issues are well behind us all. Also the fuel pump issues as well.

I'm a bit new to diesels so can you fill me in? I know the DPF can clog but what about the other 2, especially the fuel pump?

Jettech1 · February 5

32 minutes ago, waltman said:

I'm a bit new to diesels so can you fill me in? I know the DPF can clog but what about the other 2, especially the fuel pump?

Because I don't own the diesel I'm so not the expert on them from personal experience. From what I've read the CP4 fuel pumps like to shred themselves and basically trash out the entire engine. I "think" in 24 GM moved to a different more reliable fuel pump. I could be wrong. I'm really hoping someone that knows what they are talking about will chime in here. My knowledge is just from I've read, I would like to know more from those that work on them and own them. So you can basically discount everything I just wrote because I don't own one nor do I know for a fact if anything has been upgraded of which I hope it has.

ShotgunZ71 · February 5

The CP4 hasn't been used in GM trucks since 2016. Since then, they have used a Denso fuel pump which has been a pretty good piece and reliable. I think you'll be fine with any L5P if you want a later model GM diesel truck.

While the emission regulations are getting tighter and tougher, the issues are fewer and reliability better among all brands. That is good for the consumer, but does leave some doubt and hesitancy in buyers.

Jettech1 · February 5

1 minute ago, ShotgunZ71 said:

The CP4 hasn't been used in GM trucks since 2016. Since then, they have used a Denso fuel pump which has been a pretty good piece and reliable. I think you'll be fine with any L5P if you want a later model GM diesel truck.

While the emission regulations are getting tighter and tougher, the issues are fewer and reliability better among all brands. That is good for the consumer, but does leave some doubt and hesitancy in buyers.

And there we go, some factual information! Thank you sir!!

Jettech1 · February 5

27 minutes ago, ShotgunZ71 said:

The CP4 hasn't been used in GM trucks since 2016. Since then, they have used a Denso fuel pump which has been a pretty good piece and reliable. I think you'll be fine with any L5P if you want a later model GM diesel truck.

While the emission regulations are getting tighter and tougher, the issues are fewer and reliability better among all brands. That is good for the consumer, but does leave some doubt and hesitancy in buyers.

So what do you think and from what you've seen as the years have passed with these emission issues? Would you be ok with buying the GM diesel or would you say just hang out a few more years?

ShotgunZ71 · February 6

23 minutes ago, Jettech1 said:

So what do you think and from what you've seen as the years have passed with these emission issues? Would you be ok with buying the GM diesel or would you say just hang out a few more years?

I think the main thing is what the manufacturers have learned regarding emissions, their standards, and their equipment the use to control the emissions. Many have noted that DEF consumption has increased for all manufacturers the past couple years, and some have stated longer regen intervals. Much of that can vary depending on how the vehicle is driven. However, small changes in programming can help meet the ever increasing standards without a hardware change.

Yes, I would be (and am) fine with the GM diesel. I think the Duramax, Powerstroke, and Cummins are all three good powerplants across the board. I also had good service from my L8T. I could go back to one and not think twice.

Jettech1 · February 6

53 minutes ago, ShotgunZ71 said:

I think the main thing is what the manufacturers have learned regarding emissions, their standards, and their equipment the use to control the emissions. Many have noted that DEF consumption has increased for all manufacturers the past couple years, and some have stated longer regen intervals. Much of that can vary depending on how the vehicle is driven. However, small changes in programming can help meet the ever increasing standards without a hardware change.

Yes, I would be (and am) fine with the GM diesel. I think the Duramax, Powerstroke, and Cummins are all three good powerplants across the board. I also had good service from my L8T. I could go back to one and not think twice.

I don't know who you are, but your advice is amazing! Thank you for that, I really appreciate it sir!

ShotgunZ71 · February 6

17 minutes ago, Jettech1 said:

I don't know who you are, but your advice is amazing! Thank you for that, I really appreciate it sir!

You're quite welcome. I'm far from a diesel or emissions expert, but all I can offer is my personal experiences and opinions. I can only recommend you make the best decision for your uses and budget. I've been on both sides of that one, too! Some say work the crap out of modern diesels and some say to treat them like fine China. I say just use it normally like any other vehicle and do regular maintenance like any other vehicle. Crap can happen to anything and anybody.

Jettech1 · February 6

7 minutes ago, ShotgunZ71 said:

You're quite welcome. I'm far from a diesel or emissions expert, but all I can offer is my personal experiences and opinions. I can only recommend you make the best decision for your uses and budget. I've been on both sides of that one, too! Some say work the crap out of modern diesels and some say to treat them like fine China. I say just use it normally like any other vehicle and do regular maintenance like any other vehicle. Crap can happen to anything and anybody.

Wow, amen!!!