My guess is shocks if nothing else changed. I run 40 to 45 psi in tires that are max 80psi. Two reasons for it coinciding with change in tires: The winter tires were a lower pressure and affected the way the truck hit the bumps. Or the road thawed out and the bumps changed. I changed out my ranchos for bilsteins and never worried about the rear end jumping around again.
7000 miles and I've never seen my '18 6.2 Max Tow trans go over 150F. I tow diddly squat. Ambient temps have been low but I can't imagine it'll go over 170 without towing something up a hill. My '14 6 speed was always at 190+F. The '18 warms up way quicker too. Bought it as a Demo so he might have modified it or GM changed the design. If there's a way to run the trans cooler and warm up quicker it's worth every penny. Your transmission and wallet will thank you later.
It's evident that you can't be experienced in driving a variety of trucks in a variety of off road conditions. Every truck, will react differently on a surface due to a number of factors. Those include but aren't limited to: the surface itself, tires, suspension, wheelbase, and weight. Now considering you have a z71 suspension, it's relatively stiff compared to other models. Every truck will do what you experienced under the right conditions. My 2014 z71 our main highway would rattle your brains out due to its lack of dampening. The pavement wasn't broken but heaved due to frost and freeze thaw. I put some 5100s on it, and she handled the same bumps like a champ. Still bumpy mind you, but no need for traction control to kick in. My Crew Cab Standard Box NHT reacts extremely different on the same stretch of road. I used to have to drive down dirt roads for hours at 40 to 50mph to go to work. Everyday for weeks at a time. I drove a 2014 Ford FX4 crew cab standard box and 2014 Sierra double cab all terrain. Hit the right bumps and the rear end kicks out. Sometimes violently. Always in the exact same sections of road. The right bumps will cause conditions to have the rear slide out. You don't have perfect traction. It's simple to understand. In my expereicne the Ford would more commonly kick the rear end out, but the GMC was much more violent when it did. You even stated yourself that you let off the gas. You do realize that would cause a weight transfer forward. Resulting in less traction from your rear wheels. The only logical conclusion is you were driving too fast for the conditions. There is no safety issue with the truck. You're the safety issue.
6_2LTZ replied to thegarse's topic in 2014 - 2018 Chevy Silverado & GMC SierraI wouldn't baby the transmission. You just end up with a babied transmission. Give it hell, it'll sort itself out. My experience is it'll learn to go quicker if you push it to go quicker. Either tune the throttle response or learn to push the pedal harder to get rid of that bog feeling. Sort that out and you'll find the transmission to work better overall. I've had a 6 speed and 8 speed and while some of the clunks are common between the two, the 8 speed 6.2 is very smooth and very powerful. Just keep feeding it 91+ fuel.
Might just be your location. Dealers here stock loads of sle/elevations. Might be 5 or 6 slt and up for every thirty to forty lower trim levels. SLE could get leather bench seats. edit: just checked, my local dealers have 11/73 and 6/32 that are at4/slt/denali
I would consider my experience with a 5.3 compared to a 6.2 an unbelievable difference. Both were completely stock, the 5.3 was a '14 double cab SLT 6 speed with a 3.42 rear end, the 6.2 a '18 max tow crew standard bed 8 speed and 3.42 rear end. The 5.3 was much slower, burned way more fuel, and shifted much rougher. Highway driving was terrible. I'd drive slower than I wanted to simply because the truck couldn't get out of it's own way and maintain 70mph comfortably. Power wasn't readily available to just pull out and pass. Jump in a 6.2 and I can cruise all day at 70mph, easily glide pass vehicles while the transmission smoothly drops gears. It's unfortunate they're limited to 100mph (I understand the mechanical limitations of the driveshaft). It takes no effort to hit 100mph and when the power is cut it's like hitting a brick wall. There's still so much power left you get thrown forward in your seat. Lifetime I averaged about 15 to 15.5mpg on my 5.3 after 60k miles. I worked hard to get it that high. Currently, I'm averaging 18 to 19mpg after 7k miles of winter driving with my 6.2. I have fun while getting that. If I drove the 6.2 like I drove the 5.3 I'd easily average over 20mpg. I bought it with 4k miles and only drove it this winter with the exact same LT winter tires I used with my old truck. I expect I'll get 20+ mpg once summer comes around. Over the life of the vehicle, the fuel savings will more than pay for the upgrade. I ran premium in both. It's only 22cents more per gallon here. I can tell from having owned a late year '14 model that the '18 has many minor improvements that most would not notice had they not owned the '14. There's common issues with every vehicle ever made. They're amplified in forums like this. I'll take my chances with the 8 speed.
i wouldn't pay the extra for the brake kit. Stock brakes are good enough for every day use. Ventilated seats are nice but depending where you live they may not be useful. 6.2 is an unbelievably powerful and efficient motor and the 8 speed is fine. I'd be wary of a 19 since it's a first year model with the possibility of more recalls and repairs than the 18 down the road.
That should not even be a comment. It's a question because P tires weren't supplied on this man's truck. Therefore a recommended pressure isn't given on the door for the tire type. I've been many places where a P tire would not last. An LT tire is for peace of mind . The trade off is a bit rougher ride. To say not a single 1/2 ton pickup doesn't need an LT tire is extremely ignorant. They're much more resistant to flats. Try being hours from a city center in the middle of -30*C and sharing roads with heavy equipment. Ruts, ice, debris, anything can cause a puncture. I've experienced first hand guys with P tires topping them up every few days while guys with LT tires never worried about it. That's just one example. How far down the hole would you like to go? How many pickup truck owners just buy groceries with rig? Maybe everyone should just drive midsize sedans since they aren't utilizing 100% of their truck.
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