quote:

Originally posted by valkyrie1:
I don't know what year they started with that 4cyl eco mode but they have been problematic when it fails..

I've had the 8/4 cylinders on the last 2 generations of Yukons. Never had a problem on any of them pulling boat trailers, etc. The current generation (at least mine) switches so seamlessly you wouldn't notice if it didn't show on the dash.

I think when the eco system has problems it wipes out the cam and lifters which is a pretty big expense to repair. Have you checked on the fuel mileage for this unit? When we go on long trips sedans that get 38 miles per gallon ease the pain at the gas station. We do have a GMC truck and drive it only when we need a truck. I think gas prices for the next 5 years are going to be hard to accurately predict. I'm willing to skip some luxury for economy but everyone's situation is different and so is everyone's wallet.

quote:

Originally posted by Black92LX:

quote:

Originally posted by P250UA5:
I know on the Yukon, 2015 was a transition year & they had a lot of mid-year updates.
The one I found is a 2016, so one would hope those would be resolved. It's also a RWD so no tfr box to worry about.

Only recurring issue I've found from the few GM forums I can find is to do with the 8AT & the hygroscopic fluid put in on assembly.

Take a look at the Expedition/Navigators of the same vintage before you fully decide.

AND then runaway.

quote:

Originally posted by Gene Hillman:
I think when the eco system has problems it wipes out the cam and lifters which is a pretty big expense to repair. Have you checked on the fuel mileage for this unit? When we go on long trips sedans that get 38 miles per gallon ease the pain at the gas station. We do have a GMC truck and drive it only when we need a truck. I think gas prices for the next 5 years are going to be hard to accurately predict. I'm willing to skip some luxury for economy but everyone's situation is different and so is everyone's wallet.

Yes lifters are usually the victim of the AFM. my 09 Silverado had the issue at 180k which is why I traded it in and got the Yuk (growing family.) They say it is better now but not fully figured out.

Fwiw, I get 22mpg on road trips in the Yuk.

My dad is soon to be svc Mgr of a semi-local dealer, so a GM product has a bit more appeal over the competitors.
Might go check it out this weekend & see how the newer gen feels.
Poked around at Expedition & Navigator, wasn't finding any good options in higher trims for comparable prices to the Denali.

The 8 speed AT was definitely hit or miss on not only the large GM SUVs, but also half tons and Corvettes.

Our mid year 2015 was a miss. They never could get it quite right. Every now and again it would slam on the 1-2 upshift or 2-1 downshift and feel like you were going to go through the windshield. Removing the active fuel management with a RANGE device seemed to help more than the fluid flushes and parts replacement the dealership did.

I would simply ask for the maintenance history and if it doesn't have a bunch of transmission issues not worry about it to much. If it had issues I would think most of that would have been taken care of at a dealership with less than 100k miles.

Aside from the tranny issues air shocks and brakes were the only things we had to have taken care of beyond standard maintenance in 145,000 miles.

If you go that direction and want to remove the AFM with a RANGE device. I'll make you a deal on one. I traded ours off in June and have no use for it any longer.

For you folks with experience on the AFM, is there any issue deactivating it in an older engine (2010 w 86k miles)?

quote:

Originally posted by tigereye313:
For you folks with experience on the AFM, is there any issue deactivating it in an older engine (2010 w 86k miles)?

The fella who told me about them put one on his 2010 Silverado well after 100k miles.
It makes a fairly noticeable difference in drivability.

quote:

Originally posted by Black92LX:

The fella who told me about them put one on his 2010 Silverado well after 100k miles.
It makes a fairly noticeable difference in drivability.

Gonna have to look more into it. I thought at one point I had read if you install one later down the road it could cause issues. Glad to hear yer friend didn't have any issues. Would like to get one.

I have a 2017 Grand Sport with eco mode and theres plenty of issues with that setup which usually means replacing the motor. Considering getting a Ranger plug in module that bypasses it. Plenty of references in the forums about failures. Just something to consider on the 6.2ls

I had a 2016 Yukon Denali, did have the condenser go bad, but replaced it myself, as it was cheap and not a hard job to do. I loved the 6.2 and the fuel mileage was pretty good for a big vehicle, 8 speed was the biggest thing that I didn't like, but no other issues with it. It was trouble free with the exception of the condenser when I sold it with 65k on it. The guy that bought it tows a travel trailer and loves it. My best advice was if you buy a used one is to buy from a dealer and buy a comprehensive extended warranty, auto repairs have gotten really expensive and there are lots of things to go wrong on a Denali.

Thanks for all the additional input, gents.

Luckily, my dad is soon to be svc mgr of a local-ish Chevrolet dealer, so I'll be able to have service covered there, both beyond my ability & dealer cost for DIY work.

A couple messages back & forth with him & he's told me that AFM is less of an engine killer after 2011.
He's had no problems with it on his 2012 Denali & doesn't have any of the reported drone when it drops to V4.

Was chatting with my mom over the weekend.
She has a 2021 Explorer Platinum, I'm assuming with the 3.0 EcoBoost
Anyone done much with the new 3.0TT? Seems like it gets slightly better MPG than our Flex, with nearly double the power.

She barely drives it & uses her 2011 F150 a lot more, so we may try to buy it off her.

quote:

Originally posted by valkyrie1:
I don't know what year they started with that 4cyl eco mode but they have been problematic when it fails..

My 2010 Silverado has the 4 cylinder eco mode. It drove me crazy. 3 years ago I put in a Range delete disabler. It now longer goes into 4 cylinder. Best upgrade I made.

quote:

Originally posted by P250UA5:
She has a 2021 Explorer Platinum, I'm assuming with the 3.0 EcoBoost

Run far and fast from the Explorer. The transmission is an even bigger problem than the Chevy 8 spd.

Buy the F150 off her. That's the better vehicle.

^ The F150 is even older & has more miles on it.
And she drives/tows regularly with it, so it's a non-starter.

Our 2022 Explorer ST has the 3.0 EcoBoost. While we haven’t had any issues in the first 8,000 miles, I think the transmission would be a weak point if you modify the engine. The 10R60 was designed for a max input of 443 pound-feet of torque and the stock engine already has 415. I’m probably going to put a bigger intercooler though. Once the stock one heats up, the engine loses power. In the 95+ heat here, the stock intercooler is only good for a couple back to back pulls.

The only issue I’ve read about with the 10R60 is some of the 2020-2021 transmission fluid coolers leaked.

quote:

Originally posted by trapper189:
Our 2022 Explorer ST has the 3.0 EcoBoost. While we haven’t had any issues in the first 8,000 miles, I think the transmission would be a weak point if you modify the engine. The 10R60 was designed for a max input of 443 pound-feet of torque and the stock engine already has 415. I’m probably going to put a bigger intercooler though. Once the stock one heats up, the engine loses power. In the 95+ heat here, the stock intercooler is only good for a couple back to back pulls.

The only issue I’ve read about with the 10R60 is some of the 2020-2021 transmission fluid coolers leaked.

Good to know. With 400/415 I imagine I'd be quite content with it stock for a while.
Was surprised it's better on gas (allegedly) than our 3.5NA Flex.

I have the 10 speed transmission in my 2018 F150/5.0. I love it. It is the first auto transmission that I have driven that out performs a manual. It really is markedly better than what came before it. 40k miles and no issues.

2022 Explorer ST here. Been great the first 10k miles. Got it tuned for about 75 more ponies. Rarely exercise the added ponnies. Get over 20mpg if i chill. Might beef up the 10 speed, might wait to see if it breaks.