Fuel efficiency drop in newer models ?

[vcode]

Yeah if it was an XL, maybe would add a few hundred pounds... not enough to matter. You will see the rated fuel economy doesn't vary greatly

More power -- yes but simply shifting the torque to the higher RPM bands. HP is nothing but Torque x RPM / 5,252... yeah torque has gone up too (325 vs 383), but again peak in the upper RPMs.

What matters is fuel economy and tow rating for a truck. On the 1/2 tons, are you going to say GM has done a spectacular job in the last 20 years on those 2 metrics ?

Curb weight is up 800-1000 lbs on the 2024 from what I can tell. Are axle ratios the same? Final drive ratio is 0.7 for the 2002 4 speed vs 0.63 for the 10 speed. Not much difference there. A friend had a 2004 Tahoe and he was lucky to get 18 mpg on the highway. I often see 20 mpg for folks with later models here. Only so much you can do pushing a barn thru the wind.....

 

[jfoj]

Fuel economy on these bricks starts to rapidly diminish over 65 MPH. The problem is when people are pushing these bricks at 75-80 MPH, you cannot expect much, this is not how the EPA fuel economy is tested.

Additionally anyone that has a 6.2l is likely using the right pedal a lot to get around slower traffic, just bring up the Fuel Economy display and keep it on the dash, watch what the center portion is showing, you will see what happens on inclines or when the right pedal is used. If the vertical bar drops to around 25% on the fuel economy, you are likely into 80%+ engine loading.

Here a shot of a recent trip I took and I was not trying to be thrifty, I had to meet a deadline. I have done better, but it depends on a lot of factors.

 

[viven44]

Your 2024 has way more features and way more safety.

You act like none of that matters. Or how much larger the interior is?

I mean if you just wanna believe yourself that's fine but objectively on this you are incorrect respectfully.

Do you really believe all those feature are going to last 20 years ?

Do the terms "galvanic corrosion, solder joint fatigue cracking, kirkendall voiding, electromigration, dielectric breakdown" mean much ?

Unfortunately, that's all I can think about when I look at all the computer modules in modern vehicles. I work in reliability engineering of consumer and automotive grade semiconductor chips. Since about 2009 (housing and job recession), the quality paradigm has gone from "no compromises" to "good enough"... Good enough in automotive chips is 10 year lifespan. That is all the AEC (Automotive Electronics Components) expectation is.

The only good thing about new stuff is that if they breakdown quickly, there will be need for more, and will create more jobs .. need to feed more mouths as time goes on in the world so I'm happy to play the game to a certain extent, and Yeah I whole heartedly agree that safety features are a must, that is why my family members are in a 2024 Suburban... I didn't force down even a full time use of the 2002 Yukon on them... I let them decide what is best for them.. just requested them to avoid using the 2024 for short trips. For my personal use I am disillusioned with poor quality everywhere and the high level of focus of Wall street on 'profits'.. and don't care anymore.

PS: Example of where my personal requirements are.. My "forever AC" had to be on full blast today as it was about 90 degrees outside in TX. haha

 

[Blackcar]

Some of these post that posters are quoting known problem and quality I don't know why they even looked at vehicle they purchased.

 

[vcode]

Anyway.... I think we've moved onto Turbo here.... but thats not the point of this thread.

I'll put it another way...

Spot the problem

Our 2002 Yukon and our 2024 suburban have the same engine displacement (5.3L)
Our 2002 is just a simple port injected engine and our 2024 has cylinder deactivation and DI fuel system
Our 2002 has a 4-speed transmission and our 2024 has a 10 speed
Our 2002 is more fuel efficient than our 2024 for city/hwy driving
Our 2002 can tow as much as our 2024

I hope it is clear

Wait, is your 2024 a 4X4? You can't compare that to a 2WD 2002 model.....

 

[Scarey]

I don’t see a data port on that wing window. How do you do the software updates?

 

[viven44]

Wait, is your 2024 a 4X4? You can't compare that to a 2WD 2002 model.....

Well so be it. The 2024s are rated for the same city mph 4x4 or otherwise. Highway is 10% better on paper on 4x2s.

Anyway, just disappointed that the engineering decisions weren’t the best and not much has changed in 20 years. We discussed this in the other thread but the 6.6L without any DFM gimmicks is rated for the same fuel economy on the 2500 trucks….

 

[DuraYuk]

Do you really believe all those feature are going to last 20 years ?

Do the terms "galvanic corrosion, solder joint fatigue cracking, kirkendall voiding, electromigration, dielectric breakdown" mean much ?

Unfortunately, that's all I can think about when I look at all the computer modules in modern vehicles. I work in reliability engineering of consumer and automotive grade semiconductor chips. Since about 2009 (housing and job recession), the quality paradigm has gone from "no compromises" to "good enough"... Good enough in automotive chips is 10 year lifespan. That is all the AEC (Automotive Electronics Components) expectation is.

The only good thing about new stuff is that if they breakdown quickly, there will be need for more, and will create more jobs .. need to feed more mouths as time goes on in the world so I'm happy to play the game to a certain extent, and Yeah I whole heartedly agree that safety features are a must, that is why my family members are in a 2024 Suburban... I didn't force down even a full time use of the 2002 Yukon on them... I let them decide what is best for them.. just requested them to avoid using the 2024 for short trips. For my personal use I am disillusioned with poor quality everywhere and the high level of focus of Wall street on 'profits'.. and don't care anymore.

PS: Example of where my personal requirements are.. My "forever AC" had to be on full blast today as it was about 90 degrees outside in TX. haha

View attachment 457258

I've replaced modules on cars old and new. That's nothing new and nothing to be concerned about.

 

[viven44]

I've replaced modules on cars old and new. That's nothing new and nothing to be concerned about.

You are partly correct. You are only addressing the “can it be done” part. We have since about 2017-18 or so moved onto the “Apple” model of doing modules. The OEMs are highly customizing the analog and digital functions of these modules to where aftermarket modules simply won’t exist or would be cost prohibitive due to licensure cost. That means you will need to buy the modules directly from the OE like Ford or GM moving forward. No more Dorman or Cardone module.

Anyway.. see where I’m going ? These vehicles are going to be money pits, assuming they can even be fixed. For example, I simply don’t have the appetite to spend $2K on a video processing module so I can continue to run my cameras.

And its not that I’m not familiar with module programming and stuff. I’ve been there done that and choosing to play by my set of rules that’s all.