hold out for the low range... it is indispensable.. for backing up to a trailer or any number of crawling or pulling activities... i have a grand cherokee with no high range... its ok.. but a lot of capability and low speed control is lost...
Agreed. My since new mpg is 23.8 at 11,000 + miles. I am always on the open road - no city. That is 1 mpg better than my f150 - and it read 2 mpg high on the dash... Ferds!! That 2.7 Ferd is good motor, too if you don’t mind new oil pans every couple oil changes...
I have hand tested two tanks - one was a half mpg low and one a quarter mpg high than the dash. I am no hot rod... but i think you need more than 25 mile distances to get a fair reading. 50 mile distance should always be lower... stock tires with 42 lbs in them. 6 sp.. bedcover, which helped mine a liitle too. Nobody should gripe about either motor. They are both great. I suppose if i wanted the next step up in mpg i would need a canyon with the duramax.... All that said... i do think that the 5.3 is doing 2 mpg better than my F150 with 2.7 did. The 2018 sierra is a little shorter than the ford... and maybe that is what we are measuring. Anyway.. this L83 is so much superior to my ‘05 yukon 5.3 i can’t believe it. Astounding.
Detonation.. yes.. A Ford. broken ring lands - and rings. i think the piston broke first - and then the rings of course without support went. Detonation in a pre-90s Ford without the sensors and controls of fuel injected engines...
It could have been detonation... and then a broken ring.If you catch it immediately - pull the piston and replace it - you can just have some marks in the cylinder. With a broken ring.. any period of time running it- that ring - the broken part that is a half circle sized or so - the ends will gouge the cyl wall. When you pull the piston and see the ring - and the top ring - you can speculate detonation caused ring land / broken ring failure was the result.... i know this the hard way....
Will be staying in my 2018 SLT... Happy.. solid. straight panels.. and great paint..
I did take a look at a ‘20 and realized that it was a single speed... transfer case. There is no room in my garage for a single sp transfer case... Agreed only needed once in a blue moon - i used mine last may to help guide a large tree to the ground.. i think usually when i use it is for control - like backing up to my trailer to creeping a tight turn with it. My 2108 SLT is just fine... i think the de-content on the new trucks is there... you just have to study so you know what features you might miss.. i mean we all can’t afford a Denali...
I also had a Yukon a ways back... it had a 5.3 and was decently powerful, but a bit of a gas hog. Mine was a 2005, I recommend to get the 5.3 as i get 5 mpg more than the Yukon with the same driving style. Its a fine motor - and still simple enough to be reliable. Now i would not dream of modding the truck - lifting or doing anymore than going up a size on tires on stock rims. It comes down to blowing a lot of money and shortening the life of the ball joints, spindles and brakes... daily driver is best kept as GM builds it... imo.
This 5.3 is pretty new - 11,000 miles. Not much iron on the magnet. My other vehicle - JGC has a pentastar 3.6 and 3 or 4 times the shiny accusation of iron with 9000 miles on it with a similar magnetic drain plug. i am thinking the design difference is in the chains. The v8 has one chain and the jeep has 6 i think. The jeep also has a lot of rollers in the valve train. Hardening is a big factor in how much iron ends up in the oil.. but so is the design. I don’t really like the tiny filter on the 5.3 but GM might know what it is doing, too.
Had a Yukon and now have a Sierra. I miss the Yukon... it is easier for parking lots. Always used a trailer when hauling with the Yukon, which is a pain, but it keeps the mess away from the vehicle. I would not go Yukon today though. They are just too pricey. Every man has to call it the way he sees it though.
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