Had my truck in for service and complained about various transmission issues, shutter on light acceleration, clunk when coming to stop and delay/clunk reverse to drive. I mentioned to adviser about reading online about the shitty fluid and he told me the truck needs to exhibit certain issues and the tech needs to diagnose it as a fluid issue to warrant a flush. They said the shuttering wasn’t seen on scan tool and blamed it on tire balance. They did a TCM programming update though and that made a huge difference in performance! Still wouldn’t mind a flush though. Adviser told me he has an early build 8 speed and he will be holding off the flush on his own truck to extend the flush interval and still potentially have it done under warranty.
I have a 2019 Sierra 5.3 8 speed. Build date dec 2018. I’m pretty sure I have the shitty hygroscopic fluid in my transmission. I’ve experienced a few issues like clunking while coming to a stop and delay then clunk going from reverse to drive. I also feel at times that truck seems to be slipping in the transmission during a normal to slightly faster than normal acceleration. The slipping may not be slipping at all and just a normal characteristic of the truck to make it “smoother” perhaps. My truck is going to the dealer bodyshop next week for an unfortunate incident with someone hitting it with their car. Nothing major but the front bumper needs to be re-painted and left front wheel refinished(small chip). I’ll have it go to the service dept while it’s there too for an oil change, recalls and the few warranty concerns I have. I talked to the service advisor for awhile regarding the issues I’m having about the truck. He looked at TSB’s and said the clunking while coming to a stop has to do with fuel in the tank sloshing around??? My truck also doesn’t fall under the trans fluid flush TSB???WTF? Thought it would? Anyone know what I can do or say to get the fluid flush done under warranty? Hoping to get the new and improved fluid installed and get that hygroscopic shit out!!
Experienced some snow in vancouver this year. My truck handled it flawlessly. 2019 Sierra elevation 4x4 on BFG KO2’s with 3 peak mountain symbol. These new trucks all seem to have traction and stability control as well. I feel adding weight is a total old school thing and totally unnecessary. Just a waste of fuel! Kinda like the thought of only running 2 snow tires. It’s not just about getting going but also safely stopping and turning corners. I also chuckle when I see these “old school” thinkers putting cardboard in front of their radiators to help keep the truck warmer! The modern thermostat etc will keep things running at the correct temps. Not allowing the proper airflow will only make things worse. Lol
Started a topic about P rated vs LT too. Love the way the 275/65R20 fill the wheel well but the E rated BFG sure makes for a rough ride. Probably consider going down to a 275/60R20 next time just to make the ride a bit more comfortable as you’re able to get a P rated tire at that size. Who knows maybe there will be more options in a couple years in the 275/65 size?
I also notice I get a little clunk when slowing to a stop from time to time. It’s like the transmission shifts itself into 1st gear before I slow to a stop which I know for a fact if I did it manually I would get the same clunk. Driving manual transmission vehicles I would never downshift to 1st ever. Same with an auto I tend to never manually shift to 1st gear while the vehicle is in motion, wondering why the truck itself would do that resulting in a clunk.
Noticed mine has the same issue. 2019 Sierra Elevation 5.3 8 speed. Overall the transmission is 1000 times better than the 4 speed that was in my 2007 Silverado during regular driving, city or highway. The older truck I use to be able to go from reverse to drive without any issues, even be able to go into drive while still slowly rolling back. I’m not talking full speed rolling back but almost at the point where the truck was stopped but still ever so slightly rolling and it would never slam. The new truck there is definitely a delay transitioning from reverse to drive and if you are rolling backwards at all and you touch the gas pedal during the shift it will slam. Just need to really pay attention to what the transmission is doing, make sure the truck is completely stopped before making the shift. My truck is an early build, think Dec 2018 probably still with the old style fluid I’m going to ask to have replaced during the next service. Anyone know the best way to get the dealer to do fluid flush under warranty? I’m just going to complain about shifting issues and shuttering etc.
Not too concerned about it. It’s better than my last truck. I’ll probably consider less aggressive tires when I wear through my BFG’s. Not going to spend $1200 on tires now just to save a few bucks. Didn’t know they make tunes for these trucks yet.
I just did a hwy run in my truck. Unloaded and relatively flat. 2019 Sierra Elevation 5.3, 8 speed, 4x4, Max Trailering package. Level kit and 275/65R20, BFGOODRICH KO2 tires. Thought I did ok averaging around 60-70 mph or 100-110kph. Trying my best to hyper mile, but didn’t quite work out 100%. Canadian truck. I took a pic of both US and metric fuel economy and trip distance. Measurements can be changed in Dash display.
I plan to keep my current 2019 Sierra for a long time. I chose to finance at 3.99% and take all the incentives vs doing 0% because it worked out a lot cheaper in the long run. I also stretched out the financing to 8 years as 3.99% is less than my LOC at 4.5%. I can also pay it out in full anytime although I would rather pay out my LOC first.
Some good info. I definitely won’t be swapping out the tires anytime soon and will just live with the ride. I’m also sure that with the NHT package it would take away from the ride quality as well. As many have said it’s a truck. I’ve also nearly doubled my payload and am now able to tow over 11,000 lbs with the NHT. Can’t expect it to ride like a sedan. As much as I like the KO2’s and how they perform day to day I’ll probably factor in the ride quality when it comes time to replace them. May also look at new shocks at that time too! I’ll only really have the whole family in the truck while we are towing the TT and full off gear. I’m sure the truck will drive beautifully loaded down!
Not planning any hardcore off road adventures anytime soon. Just the odd dirt road I suppose with the TT. Also occasionally pull into a construction site for work but that’s about it. I’m a fan of the AT “Look” especially the KO2 look even though it isn’t really what I need. At least I’m not one of those guys running around on MT tires on baller mags! Lol. I work occasionally with a guy who has an F150 Platinum. He put BFG MT tires on it. There is absolutely no way he will ever take it off road. This dude brings a change of clothes to work so he doesn’t need to jump into his truck with “dirty” work clothes...buddy it’s a truck lol. I’ll have these current KO2’s for awhile yet as they basically still look brand new if after 16,000 km on them! I’ll deal with the bumpy ride for now but will probably “downgrade” the tires a bit for my next set. Shame there isn’t anything out there in a 275/65R20 that is P rated. Still haven’t pulled the TT yet so that will be the real test. My last truck tend to feel really “floaty” with the TT hooked up.
My manager’s demo model truck that I bought, 2019 Sierra Elevation, came with BFG KO2, LT275/65R20’s. They have a load range E. This truck also has the Max Trailering package. So far I’m very impressed with the overall performance of the tire. Haven’t ventured off-road at all but everything else I’ve thrown at them, heavy rain and snow they've performed flawlessly. Biggest complain would be the harsh ride including the rear end bouncing around hitting bumps. My 2007 Silverado Z71 definitely had a softer ride on P rated tires. 99% of the time I’m not carrying a large load but I do have a 5000lb empty 24’TT I will occasionally pull. Would you guys say even with my TT are the E rated tires overkill? I like the looks of the 275/65 tires and how they fill the wheel well but it seems like 275/65’s you’re into an LT, load E tire. Thoughts? I’m not not going to change tires anytime soon and just drive the truck, but I will definitely be looking at this down the road. I’m also sure the heavy tires and harsh ride can’t be the greatest for our 1/2 ton trucks, suspension, ball joints etc either?
Noticed a bit of this myself last night slowing to stop. Also going from reverse to drive these trucks are kinda finicky too. If you even touch the gas before the truck has fully clicked into drive it’ll slam. 2019 Sierra 5.3 8 speed(early build with older style fluid)
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