crankman

Is your Sierra 4wd? Im guessing no so have you considered have a set of studded tires just for winter?

I run 55 year around with no TPMS alarms. Its a pretty good ride for 3/4 ton truck.

Maybe just try a basic good front end alignment and have them check your tie rods and ball joints while it up on the rack. I have a 2005 1500 with similar mileage and i have a small vibration at 75mph working on it right now. I always start with small basic stuff with a problem. Good luck sir

There a good tire have them on both of our trucks, excellent on wet pavement. Smooth mine balanced out with very little weights needed. I run gravel roads weekly and there tough. I only use them on highway and gravel roads.

My 2015 just broke 20,000 miles, i drive company truck all week so there is my reason for low miles. I've had no issues with mine sounds like a good deal.

This had the same thing when my lamps were bad in taillight flasher blinked real fast it was bad lamps

I took mine to the scales it was around 7200lbs. 2015 2500 with some tools and equipment

This is a no brainer answer change the filter when you change the oil. I m not leaving dirty oil in my engine just to save whatever on a filter.

There are a few different ways to solve that problem, I put these on in 2015 and still work fine on all my trailer hooks.

I am personally glad to see the new bigger gasser trucks coming back. ?

Cant help you on the fuel gauge issue but the voltage moving around is normal for quite a few years. There are a bunch of threads explaining the reason but mine does it to.

What your seeing is normal operation, if it makes you feel better turn headlights and tow haul button and it will slowly climb up to 14 again. Mine sinks down all the time and I learned how to make it climb up by doing that. Dont overthink it to much its doing what the computer tells it to do. Its a very slow upward climb so give it plenty of time to move to 14v

I ran a thin bead of clear silicone around my 3rd brake light and it stopped my leak permanently.

ok I would get a test light 12v and verify at your truck plug what you do have. Check the turn signal left and right and running light. Definitely check as BSHORT said the harness. If the fuses are good then you should have power back there, check the ground that could keep it all from working to. Since it so new you could take it back to dealer also

Go check the fuses there labeled under the lid