curver900

My 2019 is getting 850 miles per gallon give or take yours seems pretty steep indeed. Gm should tell what the milage should be relative to the fuel burn... Maybe a call to corporate or another dealer

My 2019 with 12k on it and driven in mn winter looks almost new underneath you need to have a local body shop look at it and get an unbiased opinion not that it will matter but may help you in how to move forward

I just paid 1.45 for diesel and gas was 1.89 I feel like I was stealing ... Mora mn is having some sorta diesel war and I am enjoying it filling my truck up for less than $50 you can't go wrong with a diesel and I got 24.2 mpg on a 50 span going 65 unloaded whooot whhhot but 11 hauling the 9k toy hauler. My calculated mpg has been 20.2 unloaded for 2 tanks combined driving. My regens are at 820 miles so I passed on the update, my shortest Regen was 500 miles with idling and winter fuel

an expense... the more you spend the more expensive it is... it will be worthless in 20 years... ouch... no worries though there is no inflation... oh wait...

Napa synthetic is fine or mobil1 or any that meet the requirements. Dexos required? If so make sure it has the dexos logo

I used dexos oil in my gas 6.2 changed it early and still lost a lifter at 59k cyl 4 afm cylinder. I contend faulty design The dealer sold one and with 23 miles on it it did the same thing as mine. Some poor other person got a brand new lifter and that was on a 2018. You have to change the oil in a diesel whether conv oil or synthetic at the recommended interval, there is no extended drain interval in any reading from any manufacturer I have seen.

If you're in the snowbelt bilstiens if south then the adjustable ranchos. I guess so cal is south enough to withe ranchos I have had both the adjustables are nice.

The used car market is going to have some smoking deals,l but not sure about the truck market and how that will pan out. Good luck just make sure you test drive anything used and get the Carfax now that will help too

a diesel is not in your future here. The 6 l will run a long long time pretty bullet proof and the prices for used will be going down due to the current glut hold out another month if you can. You will come out way ahead on the gasser compared to the diesel. Change the shocks out the ride is almost the same as a 1\2 ton, lower the tire pressure to 60lbs when unladen and enjoy. And echoing the other vibration test run it to 76-80mph if it vibrates walk away and keep looking no matter what they tell you. Do a Carfax for sure

Mine does it in exactly 20 miles if kept above 40 mph

A call to gm customer service is probably in order or have another dealer or this dealer reflash it

It will also run higher idle when Regen is active iirc on mine it is right around 800-900 rpm . Make sure it completed a Regen.

RF all 4 tires... this seems to be an issue with the tires everytime they get rotated they cause vibrations... Why who knows why ? it is just plain weird... happened to me... even moving from front to rear the vibe stuck around... after they RF'd all 4 tires again then it was good as gold... even the SM was in disbelief that it worked...

well it has been a while sense I posted up. So as a follow up so far about 1000 miles sense they fixed it, it is still fixed. I was over 80 this weekend.. and I was shocked when I looked down.. I really thought I was only going 65 or so... so lucky for me I am all fixed.. I am heading to Utah for a 4wheelin' trip so for sure will get to put on a boatload more highway miles... I still have the crappy LS/2's on it but so far so good... I hope they can figure out how to fixe the rest of these that are broke... 3 tires, 1 new rearend, RF balanced to less then 10lbs per tire.. i think the threshold is 16 or 15.. but mine vibrated at that balance...

this has the same clutch system as my 4wheeler..