And since this was mentioned in an earlier post in this thread.....GM warranty "No Questions Asked".......NOT!!!!!! The LAST GM I bought was a new 1983 GMC 6.2L Diesel. In less than 10 months, it sat in their shop for more than 3 months. And the final straw was that the injector pump went out and was told that GM did NOT warranty that item....PERIOD!! No inspection for contaminated fuel or anything other than "tough chit"!! NEVER AGAIN!!!!!
In my travels, I have seen ALL brands sitting along side of the road with the hood up, so to say one brand is better than another, I think it is a wash.
As far as transmissions go, if my understanding is correct, took an Allison, found the weak points, then improved on them and called it the 6R140!! And I believe it to be a "Top Notch" transmission! I like the controls, re: the ability to lock out the top gears, and the ability to put into full manual mode, etc.
In the end.....whatever trips YOUR trigger!!! Whenever a person goes out and buys something based on everyone else's opinion, rather than their own; the odds are real long that said person will never be 100% satisfied with said item!!

There is and old cowboy saying....."When one spends money he ain't got on a horse he don't need to impress people he don't know, he will likely end up shooting the horse!"
So to the OP, buy the one YOU want, not the one your buddies tell you!!

 

Oh Sorry didn't know the platform names on the gm trucks lol. Also never had a plow on the 2006 i traded my 2008 drw ford (by far the worst truck i have ever owned) in on the gmc i bought it used with only 40,000kms had it till i traded that in on my 2011 f-350 drw never had a problem or need to replace any front end components on it. Like i said my 1991 was a hole other ball game that front end looked like it came out of an s-10

 

Well, a lot of things can change in 34 years, Don!

I think the warranty conversation here relates to the failure of Bosch CP4.2 fuel pumps. Both GM and Ford were using them. Ford would look for every last way to avoid replacing the pump (and correspondingly destroyed fuel system)...such as trying to blame contaminated fuel or other issues; GM, meanwhile, would just replace the pump and fuel system...knowing the pump had issues anyway.

 

Do you know which Bosch pump the 2017 6.7L is using?

 

I believe it is still the CP4.2. However, in 2015, the Ford version received a new special coating on the pistons which seems to have solved the failure problem.

Basically, the ULSD fuel did not lubricate the pump much beyond the minimum and any contamination, even extremely minimal contamination, could cause rust to form in the pump cylinders...which eventually caused pieces of the piston to shave off (scrapings) and make their way to the injectors and cause failure. Some people were cutting their fuel filters apart and finding metal. Not good.

That's not to say every 2011-2014 pump was failing (most did not) but they could. The coating and other possible updates should have fixed the problem. GM did not switch away because of this; they are using a brand new fuel control system that they felt was superior to what Bosch offered.

 

So then, in essence, a person could wait until about a month before the warranty expired, dump a few gallons of water into his fuel tank, take out the fuel system, and GM would just replace the complete system, and said person would now have a brand new fuel system all on GM's dime??

 

The fuel system was an expensive warranty repair. The reports I heard were that GM was giving way more leeway. Obviously, some investigation happened - the problem had to be diagnosed - but GM was pretty much replacing the failed pumps knowing they were problematic. I never owned a GM with this pump or experienced a failure, so I wouldn't know first hand. But lots of people did report this was the case, at least on that issue.

 

Well, then, I did have first hand experience with my '15 F350. I don't know if there was an electronic problem that could not exactly identify that took out the fuel system, or if the fuel system was faulty from the start. But yes, took several fuel samnples and said "Yup, our system failed, and we will replace under warranty"; but I no longer trusted the truck, and traded for a '16 and let the dealer deal with the problem.
And yes, I do understand that a lot can change in 34 years, but I got burned bad enough that I probably won't stick my fingers back in that fire any time soon!!

 

I really think this is why GM now sources the Denso for the 2017 instead of the CP4. And good on them for warrantying as many CP4 failures as they did. The CP4 "had" problems and they knew it. Admittedly though, the L5P and the Denso are unproven thus far.

By contrast, Ford is legendary for not warrantying their CP4 failures (which continues to this day), an attitude that I suspect is a result of the 6.0 days. Warranty claims were not insignificant for Ford back then.

 

I think the CP4 is a fine pump now that there is a coating. The coating requires less lubrication and makes the pistons / bore less susceptible to rust.

 

I'm sure you're correct, sir. It's the warranty support that still concerns me.

 

I think you're correct. Ford seems to be extremely hard-nosed on diesel engine warranty.

Looking at high-res images of the LP5 diesel, I'm very impressed. It looks extremely well made. The turbo is huge and seems to be more fully enclosed and it has a large electronic control box on top. The pipes for EGR seem to be a lot more high-quality than what Ford provides. That said, I still think the Ford design (originally GM design) of reverse-flow is superior.

One thing I don't see is where dual alternators would fit. But, apparently they do, since it is an option. (Ford gives you a total of 7 more amps!!)

Will be very curious to see how this engine turns out.

 

I agree.

And IIRC, the exhaust is quite different, with the first after treatment aparatus (catalyst?) hanging almost directly off the turbo. If my memory is correct, that may change the deleting game a good bit.

 

This is just my experience. I have pulled a heavy trailer with a skid steer and equipment up a very very steep mountain with both a 2016 GMC Duramax and a 2014 Ford Powerstroke. Both pulled very well. (I haven't hit 1000 miles yet with the 2017 F350, so haven't towed with it yet) The Duramax had a wee bit more speed at the top of the mountain (3 mph), however, I just about burned the transmission up doing it. The needle was buried in the red a mile before the top. After that, I would pull over to allow the Allison to cool itself halfway up as it was too abusive.
The Ford pulled hard all the way and the transmission temperature needle moved a little bit but not enough to even be a concern, just half way.


The GMC was a nice running truck. It has me concerned how it will last pulling the steep regions of the Allegany Mountains that I live in, but the Allison has always been a good performer.


For me, when the time came to buy again, I chose the Ford as I liked the way it shifted better and trusted the transmission more.