jj46

#troll

Wow. P20EE.... the same code that troubled many of us 2017-2018 model year owners with the duramax. Took a year to get a fix. In the meantime, my CEL came on probably 20 times. Nice to see it comes back up in the new model.

​ Yeah I don't think they like us posting other forum links. Keep us updated. My CEL has come on at 450 and 950 miles. Next time it will be going in. Also need to get the TCM updated, the thing can't decide if it wants the torque converter locked up or not during normal acceleration between 30 - 50 mph.

This is an ongoing problem that GM can't seem to figure out. There is a 19 page topic on one of the other forums. It has hit me as well. 300 miles and CEL, P20EE code. Some people have successfully lemon-lawed their trucks due to this, others have had many trips to the dealer having sensors replaced, DEF tank drained and flushed, injectors replaced, etc. only to eventually be told by GM corporate that "There is no fix at this time". The "contaminated DEF" was an initial guess but turned out to be false. I'm very closely monitoring that other thread... a lot of nervous people who own trucks that this issue is affecting, on both 2017 and 2018 model years.

As stated above, the fuel system is covered under the 5 year/50k mile coverage, per federal law. Not sure that the standard 5/100k would be any better for you? I drive 20k per year, but I realize the national average is less than that. Point being, you'll likely run out of miles before you run out of 5 years.

I did some research on my own, and I think you are misinterpreting the coverage. There is a 3/36k bumper to bumper. There is also a 5/100k powertrain warranty. The way I read it, is the fuel system is not included as part of the extended powertrain warranty... but still covered under the 3/36k. Additionally, when I looked up Dodge's warranty coverage, they state: 5.2 Federal Vehicle Emission Warranty - 6.7L Diesel Equipped Heavy Duty Truck A. Parts Covered for 5 Years or 50,000 Miles Diesel equipped heavy duty trucks are 2500 and 3500 models only. Federal law requires DaimlerChrysler to warrant the following emissions parts for 5 years or 50,000 miles, whichever occurs first. • Air system controls; • exhaust system (includes catalysts); • electronic fuel injection system, including injector; • exhaustmanifold; • exhaust gas recirculation valve and control system (includes EGR cooler); exhaust pipes (between exhaust manifold and catalyst); fuel pump, fuel lines and fuel injectors; intakemanifold; on-board diagnostic-system components; oxygen sensors and oxygen control module; positivecrankcase-ventilation(PCV)valveororifice; powertrain control module; transmission-control module; turbocharger. So I think we need to be careful in commenting on a lack of warranty on the fuel system... that simply is not the case. GM states: Defects and performance for heavy duty truck emission control systems including those found in 6.6L Duramax®Diesel Engines are covered for the first 5 years or 50,000 miles, whichever comes first.

Wow. I am assuming that it's common amongst brands for the diesel 3/4-1 ton trucks? Scary. Yes, the overall number of problems is very low in comparison to the number of vehicles sold. However I can't imagine plunking down that kind of money and having a problem and then having to pay several thousand to fix it while still under factory warranty.

They exclude fuel injectors from the warranty? Even during the first 3/36k? It's hearsay but I've heard of several people getting fuel system/injectors fixed under warranty. Although, the root problem was probably the pump or something else and the injectors were collateral damage.

I appreciate your info... I guess my response would be that the average commute (at least in a city) is much more than 2.5 miles, your situation is not typically the norm. With a commute that short, it will have negative effects on the engine, gas or diesel... diesel more so. I guess from my perspective, I will drive it like any other vehicle, I will do regular maintenance, I'll run a grille cover in the winter, and I won't lose any sleep over it. My neighbor has a 1 ton as a daily driver and couldn't be happier. Has had it for 2 1/2 years here in central MN.

This brings up a question that I have. A lot of people say how you have to load a diesel.. they don't like to be commuter vehicles, etc etc. If you aren't towing, the engine won't be happy, etc etc. I can't help but thinking this is maybe an old school way of thinking? I know many people that have diesels in their trucks and commute with them and road trip them (unloaded) all the time. Granted, in my case, I have a 60 mile round trip, so it's not quite as bad as the guy doing 10 miles. I'm more talking about the towing/loading of the engine. It just seems that with modern engines and technology, a diesel should have no problem running mostly unloaded, with some weekend towing. With the advanced fuel systems, computer controlled injection, large improvements in fuel economy, why would an internal combustion engine be harmed by having light work?

Unless it specifically says that in the manual, GM can expect to be replacing these on many trucks. Maybe after a few thousand they'll replace them with the plastic ones.

Same here... 70mph is 18-19 mpg. Bone stock, 342s, but only 800 miles on the vehicle so far. I'm calling BS on anyone posting 24-28 at 70 mph. Downhill and/or with a strong tailwind doesn't count.