So we should just "Lie Down" and let corporate cost cutting greed come out of our pockets in sudden and unexpected thousand dollar repair bills?
The OEM "consumer vehicle" diesel fuel system is already famous for pushing design defects, poor design, lack of filtration, and lack of effective water separators on the consumer. In short "What Diesel Fuel System Warranty?" as you keep your fuel receipts to let the fuel station, fuel supplier, and your insurance company work out Five Figure injection system repair bills and HOPE the bad design of two very close fill holes (DEF and Diesel) wasn't the cause of your problem. Now enter LSD, ULSD, and diesel laced with Biodiesel and it's ever increasing hygroscopic nature. (Ability to adsorb and suspend water over old fashioned non-LSD diesel.) If the water itself doesn't get you bugs in the fuel that LOVE the additional water may.
With all due respect before you, Robert Patton, wish to snark (Monroney sticker line item) defend GM diesels from well deserved litigation you need to recall the sole reason Lemon Laws are on the books today is from the very GM Oldsmobile 5.7 Diesel Hand Grenade. At some point the corporate bean counters need to be held to a reliable product. With engine design disasters littering the landscape in both gasoline and diesel versions: the only difference is the Denied Warranty on fuel system problems due to bad fuel and by association lack of water separators and fuel filters worth a damn. The first Olds 5.7 diesel cars had to be recalled to equip them with a basic Water In Fuel warning light! ( Just like: DUH!!! ) GM's Low Bidder Bean Counter (use of same gasoline engine production tools by way of lacking adequate headbolt count and wishing to omit WIF lights, filters, and water separators...) Olds 5.7 Diesel Hand Grenade ruined the U.S.A. diesel market for 20 years, period. FWIW: Other diesel engines were proposed at GM aside of the 5.7 that put lemon laws on the books. Ford's 6.0 diesel did give the 5.7 a good run for worst engine ever title. GM's Duramax LLY overheater could be out run by 1990' era Cummins because the LLY couldn't keep it's cool long enough to "keep up". The EPIC FAIL video of the LLY getting it's overheating ass embarrassingly kicked by the 1990's era Cummins pickup walking away hauling an RV was the star in the owner's GM Lemon Lawsuit.
GM never fixed the Duramax LLY's overheating problem. Older Duramax engines were so famous for injector problems and poor filter specs to the point GM moved the later Duramax engine injectors outside the valve covers for warranty cost cutting among other reasons. GM isn't using the CP4 anymore...
And sadly guess who else couldn't resist the low bidder! Bluntly when choosing a 2019 and 2018 RAM Cummins diesel truck ... The 2019 roller or 2018- flat tappet cam is covered by warranty. The "proven a POS" reputation of the CP4 injection pump (2019) by way of class action lawsuits (That Cummins ignored the memo's from other OEM's about) APPARENTLY ISN'T COVERED BY WARRANTY! I have seen a pile of ruined camshafts for Cummins engines at the rebuild shop: you takes your chances with modern engine oil spec changes, but, it appears warranty would be easier for a camshaft failure than a CP4 "Bad Fuel Lawsuit" coming out of your pocket.
With unobtainable diesel emissions our own EPA can't hardly even test for you will find many have a hard time continuing to want diesels. A Hemi screaming up the mountain pass with an RV in tow IMO is an easy warranty claim when something blows vs. diesel injection system "Bad Fuel" denial excuses. MPG towing? A modern diesel fuel system replacement, especially if the fuel system failure took the engine out as well, will buy you a tanker truck load of premium unleaded gasoline.
Yeah your fuel supplier will step right up and cover your Diesel fuel system, and scrap metal from stuck injector engine, etc. I have already posted up on how well that went with the ignorant lot and their Biodiesel. The state of AZ tested them and they failed badly for awhile. Lucky it was only a cheaper IDI fuel system it trashed.
No, Robert Patton: The litigation for the CP4 on GM diesels doesn't go far enough. One is still stuck with a questionable warranty on a value engineered CP4. Only aftermarket CP3 conversions have hope for the CP4 owners. In general class action litigation does very little for the consumer by way of fixing the original dammed problem.