Kevin0311

I have taken out the ARC fuse and no difference was made to mine highway vibration still present, but is unknown to me what removing the power does to the ARC. MY25 currently has 25k miles and have noticed it is 30-50% less than was new. MY24 that i traded in did the exact same and that one is the truck i attempted to fix with no change.

Rockauto 7.26 a quart a few other oils now meet the dexos R standard so there is more choices don't have to get the supercar oil.

62.62 for 8 quarts supercar 0w-40 and pf63 filter is what i found plus tax and shipping. 34.32 for 8 quarts mobil one 0w-20 and pf63 or ac.delco is 50.94 for oil and filter so i understand why price at dealerships have increased but my dealer that just did recall (passed) said oil change through them would now be $200. I never have had a dealer change the oils and this increase seems ridiculous as they can get better pricing for bulk. i now have 2 cars and 1 truck that require the supercar oil imagine if the dealer did the servicing on these 3?

passanger side rear of motor dipstick? thats where the owners manual states it is. https://contentdelivery.ext.gm.com/bypass/gma-content-api/resources/sites/GMA/content/staging/MANUALS/3000/MA3058/en_US/8.0/2k16silverado3rdPrint.pdf page 373/374

85573256 this is for my 2024 1500 not sure if your application is the same

How does that work with no thermostat? on demand waterpump? never mind i just read about it the thermal management

time for a coolant flush 5yrs, but i'm betting sticking thermostat (s) not opening all the way, not sure if the 3.0 has two like the 6.6. Not going to show code unless out of parameter (high/low temp)

Can't help you with the calibration, my original one took forever where i live to get calibrated this one i didn't even bother as i use manually for seeing behind me traveling and backing up only not worried about the transparent view i keep full screen on that camera only. it stays on until using directional. My camera on enclosed car trailer i mounted to the top/roof and don't see the trailer when ramp up

Don't the Denali's have massage seats where the high country do not?

mine has stopped working for a day after the update then the next day was fine no issue, all other functions worked fine just the super cruise function. How long since you had update done? I would give a day or so see if it comes back like mine did.

that's the issue it is such a minor vibration but very annoying especially when traveling several hundred miles on a trip, since dealers can not duplicate but only owners/drivers feel. I personally feel in the seat and armrest NOT the steering wheel this is the 23 and the 24 High country.

swapping camera does fix it, had 23 1500 got 24 1500 and had to swap camera works fine now i can confirm.

Wouldn't you feel it in the steering not the seat/armrest if it was front end halfshafts?

I replaced my factory driveshaft with a brand new oem one did not change anything, weights were on (not missing) and marked with marker on both. My truck has also been loaded (some squat) and completely unloaded going highway speeds and nothing changed either. i installed rubbers in the leaf springs, checked hub runout, replaced rear rotors, disabled ARC and several other things to try to find this issue that dealer said "could not duplicate" and ended up trading in my 23 for a 24 that does the same exact thing. 2018 is a different body/frame style then the refresh later 19's and up. your 18 is not the 10 speed either. The 8 speed trans had its issues, fluid update and convertors. DFM disabler is now available and has it's own issues at slowing and coasting speeds but have been wondering if someone with the disabler can confirm they still have this vibration issue or not, i have yet to hear of someone trying this to eliminate, yeah L9 soposely deactivates DFM but besides seat of pants have not seen proof of this either and i don't want to drive 75 mph in L9

the ring i posted is a copper crush gasket, i would consider one time use, takes up the void from the collector at the manifold to the Y pipe.