John813

Only use 93.

That's BS and I hate that most dealers have no loaners now due to the shortage in chips/supply of cars. Did they at least say how long a "diagnosis" would take? Like they would get on it right away or in a week.

Well, that's annoying. They replaced all the components and it's acting up. Makes me wonder if it went bad that fast or install error?

I drive in L9 and sport mode. Z71 package with 3.23 gears South Florida fwiw so flat roads and low DA. Highway at 78-80 I get 18-20 mpg depending on wind. My commute is 25 miles highway 3 miles city during the week. My overall average is 17.X MPG(trip 2 is lifetime). I take off aggressively in city driving. One tank I had 50/50 city/highway and it was 16.2 mpg-with me once again taking off quickly and having a boral exhaust installed. Only run 93. 99% sure when I bought the truck the dealer put in 87. Definitely felt like the truck was pulling timing/down on power. Once I got 2 half tank fillups it was back to feeling quick for a truck.

For me, one thing for it to possibly go out once. I had a 6.4L Hemi go out at 72k miles on one side and it was fine till I sold it with over 100k miles. But, I would admit I would lose the love for the truck if the lifters would fail early and often. Sort of wish they could just do a delete if it failed but I know GM won't do that. Was hoping that it was just a bad batch from 2020- early 21 for the trucks that failed early on but the your truck build date is fairly recent.

Has anyone had a second failure of the replaced parts? Would be something to replace lifters every 6k miles, for a ridiculous example.

Sure, the 2.7L TT only makes 30 less torque than the 6.2L but IMO the 6.2L could be tweaked to get close to 500 torque by GM easily. It may knock down the MPG by 0.5 so they won't do it. I've had a few ecoboost trucks. They are peppy and easy to tune, but also had the most issues out of those engines compared to DOHC or OHV V8 engines. One of the driving factors for me buying a 22 Silveradonew was that I was wondering when Chevy may drop the 6.2L in favor of a v6TT. I know that was a reason for me to buy the wife a 22 Wagoneer with the 5.7L over the 23 with the 3.0L TT.

ZR2 all day for me. PS, if you don't mind sharing, did your dealer want ADM for it?

Yea, I had that happen before on the first oil change due to the Ford plant impacting the filter on the engine(jk but maybe not) Ever since then I double check the old filter to make sure it's still attached.

Well, glad it was something very minor. lol

The towing part gets brought up a lot over multiple truck forums. IIRC even if you switched out the gears to the max tow package, for example, your door sticker still is the limit when it comes to the DOT. Now, could you improve the springs, gearing and brakes and then tow more than what it says and have a competent rig? Sure. But there is a grey area when it comes to insurance god forbid you get into an accident and DOT/Highway patrol don't allow you to jump above the listed towing capacity of a similar optioned truck from factory.

For me, I get around 19 hwy(78-80 mpg) but my city driving is limited to stop and go so far so no concrete testing there. Flat highways in S. FL Z71 package with 20's and ATs. 56 mile round trip with ~48 miles being highway. Still under 1k miles on truck so curious to see if it changes after it gets some miles on it. Same on length of ownership. I want to keep this long term and only the DFM is the thing that "spooks" me in terms of durability.

Yea it has DFM. My window sticker says the same thing. Could tell on highway when it would turn on. I've just been running the truck on L9 to disable it. I notice no real change in MPG. I could tell when the truck would drop cylinders on D/L10 but don't notice it on L9. For me if it fails, it fails. Figure after the warranty expires I'll rip all of the lifters/cams/dfm stuff and tune it to completely get rid of it.

So, short term testing from a 6.2L I only saw a 1mpg loss at 80 in 10th with DFM to 9th with DFM off. Went 10 miles in each gear empty highway(no drafting) 19mpg on, 18 off.

The 6.2L made me switch from Ford to Chevy. Even with the lifter issues, I rather deal with that possibility than dealing with another Ecoboost issue(3 for 3 in different vehicles) I wanted a V8 with a lot of power. And that's what I got. Gas prices and MPG be damned.