1) NVH (Noise, Vibration, Harshness)
NVH causes driver fatigue, as shown by peer reviewed, statistically significant, independently funded studies. Comp(etition) has lower NVH and necessarily, driver fatigue on long trips.
Solid front axle is much stronger than IFS. The trouble that GM has with their IFS alone is dangerous not even towing, let alone towing. No thanks. Will keep the solid front set up any day.
2) Throttle response
The "pedal lag," materially different from turbo lag, has created an aftermarket industry to fix the problem - Pedal Commander exists for a reason.
Comp does not appear to have the problem to the same extent.
I agree with this, but if you've never towed a huge trailer, you hate the lag and pedal response. If you drive daily and tow, you freaking LOVE it and HATE the other manufactures driving characteristics.. The constant pulling/jolting when taking off is SO annoying. If you've ever drove a 30'+ trailer behind your truck, you know EXACTLY what I am talking about... and RAM Nailed that!! It does suck for daily driving without towing.. but again, this truck was ment to work.
3) Purchase cost
All 3 manufacturers have room to improve on their ~$9K diesel option cost; without delving into price elasticity, customers would get more value if the diesel option were cheaper.
There are a lot of components that are added to these vehicles with the CTD. Emissions is to blame here.
4) Operating costs
If 900 or 930 ft-lbs is enough, more MPGs, more miles between scheduled maintenance, faster/cheaper/easier maintenance, and lower DEF consumption would all deliver customer value.
DEF combustion? Dailiy driving, you can go almost 20 tanks without filling up.
$80 for fuel filters every 15K miles is alot cheaper than $300 injectors. I do 1 oil change a year..
5) Fault tolerance
Thirty years ago, diesel was the indestructible, unstoppable, high torque, & high efficiency engine choice. Now it's a "pay to play" option that's ironically and surprisingly delicate. Without arguing emissions regulations, increased fault tolerance (crappy fuel, water in fuel, extended idling, low/no load driving, short trips, etc.) would deliver customer value.
Feel free to flame on.
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Emissions to blame here.