With that much salt, you need to be lubing the sliders and pins on the calipers every spring. Its pretty plain to see what happened. The pad backers corroded and stuck on the slider. causing the inside pad to wear prematurely. It's not uncommon on GMT900 and K2 trucks to go 100k miles on a set of OE pads/rotors.
See Pg 17. https://www.gmc.com/content/dam/gmc/na/us/english/index/about/trailering-towing/02-pdfs/GMTB18CT100-2018-gmc-trailering-guide.PDF Best reference I could come up with on short notice. I can assure you, my window sticker says 3.42. EDIT: Looks like the 6.2 8-speed non-NHT trucks only came with the 3.23, but the 5.3 were available with 3.08 or 3.42
Lose the E rated big tires and back off the hammer to 75 or lower and it might be worth it. Otherwise, likely not worth it. You certainly won't save enough on fuel to make up the price difference. Not really concerned about the topper, a tonneau cover can actually improve mileage over an open bed, so I can't imagine a topper will hurt you that much. It's the heavy, aggressive tires and high speed that will kill you. It costs money to go fast. On my truck, with factory P rated 32" tires, you take a big hit increasing cruising speed from 70 to 80.
Of course we hear lot of complaints on the 8L90 transmission shuddering and banging. I'm just wondering how many out there have been problem free, since folks with problems seem to be the most vocal (rightfully so). My 9 month old 2018 5.3 SLT PP with 14,000 miles has been flawless except a little thud going from Reverse to Drive when the truck had less than 1,000 miles. How's yours?
An inattentive lady bent my bedside when she backed into it with less than 3k miles on my new 18. I used the dealer body shop. Manager was good enough to get me a whole new bedside instead of bondo. He mentioned to me that his shop doesn't straighten frames PERIOD. Any bent frame on a K2 or newer truck means they order a new frame and transplant the truck onto it. My guess is the at-fault party's insurance company pushed hard to get them to do it on the cheap. I'd personally be pretty PO'd at the body shop for giving in.
Too much $$$ IMO. I think you could get a new 2018 LT CC 5.3 6-speed 4x4 for close to that number if you shopped around.
They're putting a whole new bedside panel on mine. She also got the taillight which is $675 by itself. I'll give her credit. At least she was honest enough to leave a note (and after 2 old ladies chased her down yelling about a felony) she called the police on herself and got a report made with her on the record as admitting fault. All that's left is to wrangle with her insurance co over diminished value and take it in to get it fixed.
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